Jump to ContentJump to Main Navigation
Law for Computer Scientists and Other Folk$

Mireille Hildebrandt

Print publication date: 2020

Print ISBN-13: 9780198860877

Published to Oxford Scholarship Online: July 2020

DOI: 10.1093/oso/9780198860877.001.0001

Show Summary Details
Page of

PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 28 November 2021

Law, Democracy, and the Rule of Law

Law, Democracy, and the Rule of Law

(p.17) 2 Law, Democracy, and the Rule of Law
Law for Computer Scientists and Other Folk

Mireille Hildebrandt

Oxford University Press

Abstract and Keywords

This chapter faces the question of law's ‘mode of existence’, by asking what law does—and how. To accomplish this, the chapter explains the concept of the ‘sources of law’ and the nature of legal reasoning, notably the attribution of legal effect when specified legal conditions apply. The crucial distinction between primary (regulative) and secondary (constitutive) rules is discussed, thus demonstrating that law is not a ‘bag of rules’ but a dynamic architecture of legal norms (rules and principles). Finally, we address the question of the relationship between law, democracy, and the rule of law. To qualify as law, a normative framework must aim to sustain, develop, and balance certain values—even though they may be incompatible in concrete cases. These constitutive values are defined as legal certainty, justice, and instrumentality.

Keywords:   law, democracy, rule of law, legal reasoning, primary and secondary rules, constitutional democracy, politics, morality, justice, legal certainty

Some people believe that law is a set of orders backed by threats, but this raises issues with legal rules that determine when a marriage is valid. Nobody is ordered to marry, there are no threats when you don’t. It is just that you cannot get married if you don’t follow the rules. The rules do not regulate but constitute a marriage in the legal sense of that term. Others like to think of law as a bran-tub of social norms, but many social norms are not legal norms. Shaking hands may be a social norm, but in principle it is not required by law. Many assume that law is a system of legal rules, but what does this say for the principles that ground these rules and the policies that refine them? If these principles are not law, and these policies not under the rule of law, what are they? Still others may claim that law is simply a subset of moral rules (those with teeth), but that would imply morality in driving either right or left.

2.1 What is Law?

‘Trying to define law is like trying to hammer a pudding to the wall’, wrote legal historian Uwe Wesel. This does not mean that we have no idea what law could be, but rather that our knowledge is implied or tacit knowledge. Such knowledge may lose part of its meaning when translated into the straitjacket of explicit or positive knowledge. In the end, the proof of the pudding is in the eating: ‘the life of the law has not been logic but experience’ (as Supreme Court justice Oliver Wendell Holmes wrote).

The fluidity of the legal pudding is also the result of the dynamics and complexity of the environment that modern positive law interacts with. This may be a feature, rather than a bug, as the need for iterant interpretation that is core to written law requires flexibility in the face of changing circumstances. Legal certainty, one of the core values of the law, is not about fixating the meaning (p.18) of legal norms once and for all. Instead, legal certainty targets the delicate balance between stable, legitimate expectations and the ability to reconfigure or contest them.

To qualify as law, a normative framework must aim to sustain, develop, and balance these values—even though they may be incompatible in concrete cases. This requires a combination of analytical thinking, well-developed argumentation, and a keen acuity as to the implications of interpreting the law one way or another. We will return to this point at the end of the chapter.

2.1.1 Sources of law

A source may be a spa that provides refreshing mineral water, an archive to be used for historical research, a witness queried by a journalist, or an encyclopaedia with information about whatever subject or topic. More generally, a source of knowledge refers to where we can find the answer to questions such as: what is the capital of France? where can I find good wine? what is the structure of DNA?

In law, the term ‘source of law’ has a very specific meaning. It refers to both more and less than a source of knowledge about the law, as the sources of law are constitutive of law. A source of law (1) provides legal norms with authority based on their origin, and (2) makes legal norms binding in their effect. First, it refers to the origin or provenance of valid legal norms, that can only be derived from specific sources that thereby give authority to legal norms. For instance, a newspaper article with information about the law is not a source of law, and neither is a Wikipedia article or the website of a law firm. To ensure legal certainty, only a limited set of sources counts as sources of law: international treaties, legislation, case law, doctrine, fundamental principles, and customary law. Only these sources provide legal norms with authority and (p.19) make them binding in a specific jurisdiction (either national, international, or supranational).

  1. 1. Treaties bind the states that have signed and ratified them. They constitute law between those states and—depending on the type of treaty—they may also bind citizens and other legal subjects within those states. In Chapter 6 we will look into the binding effects of treaties in more detail.

  2. 2. Legislation (including a written Constitution) imposes general legal norms on those that share jurisdiction (e.g. within a national state). These norms enact prohibitions and obligations, including obligations not to interfere and rights to such non-interference or rights to specific actions by others. Legislation is binding for all those subject to its jurisdiction. A written Constitution has a special status, as it normally defines the powers within the state (legislative, public administration, courts; the relationships between, for example, the national level and sub-national levels, such as a federation and the states, or the central government and provinces and municipalities). Often the Constitution also contains a set of constitutional rights that aim to protect citizens against the state, comparable to human rights and fundamental rights.

  3. 3. Case law is the result of judgments made by courts. These judgments are simultaneously the result of applying binding legal norms, and a source of legal norms. This is due to the fact that legal norms must be interpreted in the light of the case at hand, which may differ from prior cases—requiring a new interpretation of existing law.

  4. 4. Doctrine is a body of texts published by lawyers of standing. These texts, restatements, treatises, scholarly articles, or monographs, develop a specific interpretation of a part of the legal framework. This is done either to provide a systematic introduction to and overview of relevant legislation and case law, or to develop a new line of argument with regard to specific issues (e.g. breach of contract in the case of e-commerce, presumption of innocence with regard to predictive policing, consent in data protection law).

  5. 5. Fundamental principles of law are the principles that are implied in other legal sources, as they inform the applicability and the application of legal norms. They do not function as ‘rules’ that either apply or do not apply, but as an implied philosophy of law that must be taken seriously when deciding the law. One can think of the principle that equal cases must be treated equally and unequal cases unequally to the extent that they are unequal. Or of the principle of fair play in administrative law, meaning (p.20) that government agencies should be impartial when deciding on policy and decision-making.

  6. 6. Customary law (including an unwritten Constitution) is at stake in the absence of written law, when legal subjects (e.g. states in the realm of international law) have acted in a consistent way thus raising legitimate expectations as to how they consider themselves bound. In principle it requires usus (a habit of acting in one way rather than another) and opinio necessitatas (a shared opinion that this habit is actually based on a duty to act in such a way). Some states do not have a written Constitution, though the powers of the state are nevertheless defined and restricted (as with written Constitutions). In that case the Constitution is part of unwritten customary law, and similar to written Constitutions, it has a special status that ranks its binding force above that of other sources of law.

2.1.2 What law does Legal effect

If sources of law are not merely containers of information ‘about’ the law, what are they? What does it mean to say that law actually ‘does’ things? Let us return to a civil servant declaring a man and a woman ‘husband and wife’ and add examples such as a court sentencing a defendant to five years of imprisonment, or a legislature enacting a speed limit. In all these cases ‘the law’ attributes ‘legal effect’ based on specific conditions being fulfilled. When the law speaks (by mouth of the administration, the court, or the legislature) it actually performs what it says.

This is a prime example of speech act theory, which discriminates ‘locutionary speech acts’ (Tim and Paula are married) from ‘illocutionary speech acts’ (I declare Tim and Paula to be lawfully married). A locutionary speech act is propositional or descriptive (a is p), whereas an illocutionary speech act is performative since it achieves what it declares (I declare a to be p). The ‘achievement’ that is ‘performed’ actually consists of what lawyers call ‘legal effect’: if all legal conditions for a valid marriage are fulfilled, including the declaration by the civil servant or the registration of the marriage in the civil registry, then the legal effects that positive law attributes to a marriage apply. The precise legal effects will depend on national law. For instance, whether or not a marriage entails a community of property by default differs depending on national law. Dutch law—until 2018—had ‘community of property’ as a default, whereas across the legal systems of the United Kingdom there is a (p.21) ‘separate property system’ by default. In both cases one can sign a prenuptial agreement with a notary public to change the default. In the case of a community of property, the legal effect consists in both partners being liable for debts incurred by the other, meaning their assets can be seized to compensate for debts of their spouse.

The difference between moral norms and habits on the one hand and legal norms on the other, resides in the specificity of legal effect that is not inherent in moral norms or habits. Legal effect is not contingent upon the moral inclinations of the person addressed but takes effect depending on the stipulations of positive law. In that sense, law is not ‘soft’, and the study of law is not a ‘soft science’. The law has real effects that make a difference in the real world. If murder is defined one way, you may go free, if defined slightly differently, you may go to jail for ten years. In law, definitions have legal effect, they make a difference that makes a difference. The reach of such definitions is determined by whoever gets to define the meaning of a norm. Under the Rule of Law, the legislature determines the law but the court has the final say on the meaning of the law. This does not imply that definitions are easy.

In 2012, the US Supreme Court decided the case of US v. Jones.1 The case was about the lawfulness of GPS tracking of a car by the police, after the warrant expired. The question was whether the evidence gathered, thanks to this tracking, was lawfully obtained or had to be excluded as illegally obtained. The defendant claimed that GPS tracking without a valid warrant violates the Fourth Amendment of the US Constitution:

The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.

This amendment basically grants people (1) a right to be secure against unreasonable searches and seizures, (2) meaning that searches and seizures require a specified warrant, which can only be granted in case of (3) probably cause. Up until this decision, it was unclear whether the Bill of Rights prohibits GPS tracking unless a warrant has been given. Clearly, when the Bill of Rights was enacted in 1791, GPS tracking did not exist and no such thing was foreseen by (p.22) its authors. The Supreme Court had to decide whether GPS tracking nevertheless constitutes a search in the sense of the Fourth Amendment, which is considered unreasonable without a valid warrant.

The Court unanimously voted that GPS tracking was indeed a violation of the Fourth Amendment, with the effect that any evidence obtained based on such tracking could not be used. Three types of Opinion can be written by Supreme Court judges to explain their position with respect to a judgment: (1) the Opinion of the Court, explaining the reasoning behind the decision, (2) a concurring Opinion, explaining the same decision based on another reasoning, and (3) a dissenting Opinion, explaining the reasons for dissenting with the majority about the decision. Since the Court was unanimous in its verdict that GPS tracking constitutes a violation of the Fourth Amendment, there was no dissenting Opinion. However, next to the Opinion of the Court, a concurring Opinion was written, endorsing a different underpinning for the same decision.

The Opinion of the Court, written by Justice Scalia, describes the privacy violation in terms of a physical intrusion upon the property of the defendant (the car), relating this to the tort of trespass. What matters here is the violation of a property right. The concurring Opinion of Justice Sotomayor describes the privacy breach in terms of a violation of the reasonable expectation of privacy, which is directly related to the mobility pattern that can be derived from the location data collected by the GPS tracker. Though both Opinions reach the same conclusion, and thus underlie the same decision, the implications for new cases will be different. Whereas the defendant may not care about the reasoning as long as the evidence is excluded, lawyers will be more interested in the reasoning than in the outcome. To the extent that future cases are similar to the case at hand, the reasons given in the Opinion of the Court will determine their outcome. In fact, a lawyer will also be interested in the argumentation of a dissenting Opinion, because these arguments provide reasons that may be relevant in future case law. This is because the Supreme Court may decide to overrule its own previous line of argument, and follow the argumentation of a dissenter (in previous case law). The reasoning of Justice Scalia has a limited reach for other cases, because it seems to require physical trespass upon the property of another. The reasoning of Justice Sotomayor has a broader scope, as it does not depend on such trespass, and instead considers the far-reaching consequences of mobility profiles for the legitimate expectations of privacy. This reasoning could also uproot the so-called ‘third-party doctrine’ that has severely restricted the right to privacy in the United States, and will be discussed briefly in section 5.2.1. (p.23)

In 2014, the Court of Justice of the European Union (CJEU) decided a case that questioned the validity of the Data Retention Directive 2006/24/EC.3 This Directive aims to harmonize the law of the member states (MSs) of the EU, with regard to the retention of telecom data by telco providers. The goal is to ensure that such data remains available for police investigation of serious crime and terrorism. The Directive only concerns metadata, such as traffic data, time-stamped location data, and identification data; it does not require the retention of the content. The Court notes that such metadata provides detailed knowledge of a person’s whereabouts and of their relational network, thus enabling very precise insights into a person’s private life. The Court concludes that such retention interferes with the fundamental rights to privacy and data protection, as formulated in the Charter of Fundamental Rights of the European Union (CFREU):

Article 7 Respect for private and family life

Everyone has the right to respect for his or her private and family life, home and communications.

Article 8 Protection of personal data

Everyone has the right to the protection of personal data concerning him or her. Such data must be processed fairly for specified purposes and on the basis of the consent of the person concerned or some other legitimate basis laid down by law. Everyone has the right of access to data which has been collected concerning him or her, and the right to have it rectified. Compliance with these rules shall be subject to control by an independent authority.

(p.24) Notably, the Court considers that not being informed of such interferences will generate a feeling of being constantly surveilled. The fundamental rights of privacy and data protection, however, are not absolute in the sense of having unlimited application. Often, these rights will have to compete with other fundamental rights (for instance, freedom of expression), or with legitimate private and public interests. This requires a delicate and well-argued balancing act, as it results in the limitation of a fundamental right. Article 52 of the CFREU stipulates the scope of lawful limitations:

Article 52 Scope of guaranteed rights

Any limitation on the exercise of the rights and freedoms recognised by this Charter must be provided for by law and respect the essence of those rights and freedoms. Subject to the principle of proportionality, limitations may be made only if they are necessary and genuinely meet objectives of general interest recognised by the Union or the need to protect the rights and freedoms of others.

The Court finds that the interference does not adversely affect the essence of the rights, because it does not concern the content. It also finds that, in itself, retention to make metadata available for law enforcement is an objective of general interest. However, the Court considers the measures as enacted in the Data Retention Directive to be disproportional, that is, appropriate, but not sufficiently circumscribed to ensure that the interference is actually limited to what is strictly necessary: the scope of the retention measures is undifferentiated, there are no limitations or exceptions; no objective criteria have been stipulated or required to prevent data from being used for anything but the most serious offences; the retention period does not differentiate between categories of data; and, finally, the Court observes that storage outside the EU is not prohibited (which reminds us that this judgment was decided in the aftermath of the Snowden revelations).

The final verdict of the CJEU declared the Data Retention Directive invalid, due to a violation of Articles 7 and 8 of the CFREU. This had sweeping consequences, because it meant that the national laws of the MSs of the EU that were based on the Directive might therefore be unlawful, if they shared the shortcomings of the Directive.

(p.25) Legal norms are often explained in terms of a system of legal rules. In the next section, 2.1.3, we will see what this means for legal methodology, that is for ‘legal reasoning’. Legal reasoning is based on the idea that if specified legal conditions apply then a specified legal effect is attributed. This raises the question: what types of legal effect are available? Effective and practical individual rights

The concept of rights is an essentially contested concept, as are most of the terms that ground the generative nature of societal intercourse. Some folk may use the term in a loose way, geared more to moral claims (I have a right to hack into your system if you don’t keep it properly secured) than to the performative language of legal rights.

A legal right is a very special ‘thing’, providing a legal subject with specified powers to act in relation to others, or the liberty to ensure that others will refrain from interfering with the object of their right. Though we may intuitively think we know what rights are, attempts to define or analyse them usually end up in complicated framings that generate more problems than they solve. One such attempt is Hohfeld’s infamous typology, which dissects the language of rights, claiming that ‘things’ like property rights are in point of fact bundles of claims, liberties, powers, and immunities:

  1. 1. One can have a claim right against another person that they act in a specific way, which correlates with that other person’s duty to act that way (I sell you a book against a specified price and have a claim right to you paying the price; you have a duty to transfer the property of the book to me).

  2. 2. One can have a privilege (liberty) against another person that you have the freedom to act in a specified way, which correlates with that other (p.26) person having no claim that one does not act that way (if I own a book I am free to dispose of it and no other person can claim that I cannot throw it away).

  3. 3. One can have power (authority, competence) over another person to act in a specified way, which correlates with that other person having a liability to act as specified (if I am an employer I can require my employees to perform specified tasks that are part of the job; they are liable to carry out those tasks).

  4. 4. One can have an immunity against another person with regard to specified actions, which correlates with that other person not having the authority to disallow such actions (if I am an employee I have an immunity against my employer requiring me to engage in improper or unlawful behaviour; the employer lacks the authority to make me do this).

The owner of a house has a claim right against the person who rents the house, a liberty against anybody trespassing, authority over the broker who is engaged to sell the house, and an immunity against a neighbour asking that they grow a specific type of tree in their garden.

All this is very interesting, though I am not sure the scheme solves the problems we face in real life. For instance, what if the neighbour claims that the trees you grow take away all the light in their kitchen? Do you have an immunity against their right that you cut the trees, or would invoking such immunity qualify as ‘abuse of right’? Also, many authors have detected inconsistencies, for instance because Hohfeldian terms often have another meaning in positive law. For instance, in tort law the term liability refers to the fact that a tortfeasor is legally responsible for the damage caused, resulting in a duty to pay damages. In Hohfeld’s framework the term has another meaning, as it correlates with a competence rather than with a claim right. We shall therefore not use Hohfeld’s terminology in this work, other than to create awareness that rights and obligations have different meanings, depending on what legal effect the law stipulates for them.


It is crucial to take note of the fact that individual rights that can be enforced against others are a recent invention (attributed to Hugo Grotius in the sixteenth century), not a natural attribute of either human beings or human society. For such legal rights to be ‘practical and effective’ a system of institutions must be developed and sustained that ensures that such rights are upheld against the law of the jungle and against the survival of the fittest. To safeguard rights against arbitrary power we need rules, and to protect rules against arbitrary power we need a rule of law instead of a rule by (means of) law.

Competences are legal powers that enable a legal subject to lawfully act in a way that impacts the legal status of others.4 For instance, the owner of a (p.28) good has the legal power to transfer the property; a legislature has the competence to enact binding legislation; a court has the competence to authoritatively decide cases, public administration may have competence to take decisions on building permits, social security grants, and tax applications. Competences are both constituted and limited by law (whether written or unwritten).

This will be further discussed in section 2.2 and throughout this book, notably when analysing the case law of the highest European courts.

2.1.3 Legal reasoning

If we understand law in terms of legal conditions and legal effect, the prominence of interpretation and argumentation becomes clear. This is connected with the possibility of contestation and the need for justification.

Legal reasoning is not just a matter of method, but first of all one of justification. It is not merely about heuristics but about legitimization. One could say that ‘solving’ a legal problem commences with heuristics, figuring out potential solutions. This will entail establishing the relevant facts (Peter hit Paula, who died), identifying potentially applicable legal norms (e.g. the criminal offence of negligent death, manslaughter, or murder), interpreting the facts in light of the norms (what if Paula is a cow, are the facts still relevant?) and interpreting the norms in light of the facts (what if Paula is a dangerous criminal who was on the verge of killing Peter?). After establishing and interpreting the facts in light of the norms and vice versa, a conclusion will present itself—based on the fact that if specific legal conditions apply, a specific legal effect will be attributed. Alternative solutions will also present themselves, as both the facts and the norms may be interpreted differently and the relevance or completeness of the facts as well as the identification of the applicable norm may be debatable. Sometimes, different norms with contradictory consequences (p.29) are applicable, requiring a higher-level decision on the priority of one over the other.

This scheme raises a number of questions that are best framed in terms of legal conditions and legal effect. As to the applicable legal conditions, the first question is which legal norm is relevant and how it relates to other relevant legal norms. Should the public prosecutor stick to murder or bank on manslaughter? To answer that question, the norm must be analysed in terms of the conditions it contains, for example, death of the victim, causation by an act or omission of the defendant, intent, and potential justification or excuse. The next question is whether these conditions are fulfilled, which requires an investigation of the facts, for instance asking which actions have been identified, which are missing, and which are relevant for the case at hand. These facts are historical events that must be reconstructed based on evidence such as witnesses, documents, forensic materials, and reporting, including inferences based on the available evidence, context, and common sense. The law of criminal procedure has strict requirements for what counts as lawful evidence (e.g. the police need a warrant for invasive investigation measures), and for the level of certainty that counts as proof that the offence has indeed taken place as charged.

This is a delicate operation that must be undertaken with great acuity, making sure that judgment is suspended until proof can be established (p.30) beyond reasonable doubt. Note that we are dealing with an example of criminal law, whereas the law of evidence and the burden of proof may differ in private law and administrative law. After deciding that the legal conditions apply, their legal effect must be established, which will be the final step in the ‘solution’ of a case. This will again demand interpretation. Criminal offences are usually threatened with a maximum punishment. This means that a court must weigh the seriousness of the offence and the culpability of the offender, taking into account numerous circumstances, before imposing a sanction. The fundamental legal principles of equality, fairness, and proportionality will require that similar circumstances will result in similar punishment, so the court will have to develop and sustain a policy to avoid arbitrary sentencing. This entails that the choice of punishment must be motivated.

Application of legal conditions and legal effect is not a mechanistic affair. That is why legal reasoning is a matter of argumentation rather than logic, built on experience, expertise, and a salient acuity as to the many layers of interpretation that constitute legal judgment. Once judgment is given, legal effect is operational, based on the performative nature of legal decisions: if the accused is acquitted, she can legally ward off any punitive measures; if she is convicted, she can be imprisoned or fined accordingly.

The study of law is the study of legal conditions and legal effect. This entails an in-depth understanding of the sources of law and the arguments and lines of argumentation available for the justification of legal decision-making. In a sense, the study of law is about anticipating what a court will decide if confronted with the case at hand. As Oliver Wendell Holmes wrote: ‘The prophecies of what the courts will do in fact, and nothing more pretentious, are what I mean by the law’.

(p.31) 2.2 What is Law in a Constitutional Democracy?

Law is closely related to politics (who decides the law?) and to morality (what content should prevail?). In many ways, law, morality, and politics are mutually constitutive. However, ‘in many ways’ does not mean ‘in any way’. In a viable constitutional democracy, law, morality, and politics cannot be related in an arbitrary fashion.

First, to some extent, law shapes the playing field for politics by the institution of legislative, administrative, and adjudicative powers that are both enabled and constrained by such institution. This refers to one of the core functions of the law: the simultaneity of its instrumental and protective nature. Law allows legal subjects, including the state, to act in law and to generate legal effect, but always conditioned by limitations that ensure, for example, legal certainty, proportionality, and transparency. Legal norms provide competences in a way that also protects interests, rights, and freedoms considered worthy of protection. Note that these interests, rights, and freedoms may be private interests, but their protection is often deemed a public good. Privacy, for instance, may be a private interest of an individual person, but it’s protection is also an important public good as it aims to sustain and protect the individual autonomy on which a vigilant democracy depends.

Second, to some extent, law creates the level playing field that enables individuals, companies, and government agencies to act ethically. The point of law is not to impose a specific morality on its constituency, but to provide the preconditions for developing an ethical stance and acting upon it. If companies are aware that data protection law prohibits cookie walls that force users to consent to privacy policies they would otherwise not consent to, they can develop other types of business models—knowing their competitors are forced to do the same.

Third, law in a constitutional democracy constrains and enables both politics and morality in very specific ways. Democracy is not the dictatorship of the majority but a system of checks and balances that requires a ruling majority to take into account that democracy implies that minorities can become majorities. This means that a ruling majority should not act in ways that pre-empts minorities from becoming a majority.


2.2.1 Law, morality, and politics, and the nature of legal rules

One of the most famous legal philosophers of the twentieth century was Herbert Hart. In his seminal The Concept of Law, he explained the meaning of law in terms of three questions, aiming to set law apart from morality and politics.

The first question asks how law relates to and differs from orders backed by threats (commands).

The second question is how legal obligation differs from and relates to moral obligation. (p.33)

The third question that Hart asks to clarify the nature of law inquires into the nature of legal rules. What are rules and to what extent is law an affair of rules?

This raises the question of what determines the validity of legal rules. Hart’s brilliant answer was that this is decided by law itself, in a highly distinct way.

(p.34) Secondary rules confer powers, for example, ‘Parliament decides on criminalization’, ‘if you kill you will be punished with …’, ‘to be legally married the marriage must be inscribed in the civil registry’. Hart argues that the difference between primary and secondary legal rules is typical for modern positive law, as it allows a court to authoritatively determine the validity and thus the applicability of legal norms without resorting to either regularity or brute force.

2.2.2 Legal certainty, justice, instrumentality

We end with the concept of law that was introduced in the beginning of this chapter, based on the work of Radbruch. The reason for selecting Radbruch is that he pins down three goals that law must serve, without ignoring the fact that in concrete cases these goals are often incompatible. He withstands the temptation to reduce two of these goals to sub-goals of one and thus to resolve the tension between them. Instead, he highlights the importance of nurturing this tension, sustaining it, and thus challenging lawyers to continuously reinvent the right balance or trade-off, without thereby discarding any one of the three goals as being overruled. This accords with a difference of opinion between Dworkin and Hart about the nature of law. Whereas Hart initially claimed that modern law can be characterized as a system of legal rules, which are either applicable or not, Dworkin argued that the decision as to which legal rule applies and how it must be interpreted in concrete cases involves an important role for legal principles. Other than rules, Dworkin said, principles do not follow the binary applicability of rules. Principles have a certain weight, depending on what is at stake in the case at hand. In the case of competing rules, either one will ‘win’. In the case of competing principles, both can be relevant and both can inform the decision (notably the decision as to which rule is valid), though their impact on the decision may vary. For Radbruch, who served as Minister of Justice in the Weimar Republic in the 1930s, the tension between justice, legal certainty, and instrumentality in law was not mere intellectual nit-picking. The rise of Nazism and the role of law as an instrument of genocide challenged the balance between law’s fundamental goals. (p.35)

  • Legal certainty refers to the need to provide a foreseeable response to one’s actions, in order to create societal trust. For Radbruch, this refers to law’s ‘positivity’ or ‘positiveness’, that is to the fact that law is ‘posited’ by a legislature (and by the courts that decide its correct interpretation). The legal power to ‘posit’ the law is based on what Hart termed a set of secondary rules that determine the validity of legal norms. Though Radbruch was not a positivist in the sense that he only cared about the formal validity of legal norms, he attached particular importance to the ‘positivity’ of law and the legal certainty it provides. He explains that precisely because we may not agree about what moral duties we have, law provides a measure of certainty about the legal rights we have and the legal obligations we should comply with. Legal certainty is also connected with the notion of equality before the law; it is the opposite of arbitrary, discriminatory, or explicitly unjust exercise of state authority. The goal of legal certainty does not necessarily overrule the other two goals; if so, their ranking would collapse into a positivism that separates law entirely from both morality and politics—thus turning it into an unresponsive and mechanical form of administration.

  • Justice refers to treating equal cases equally, and unequal cases unequally to the extent of their inequality. This is directly connected with legal certainty as this should enable people to plan ahead, being capable of anticipating how their actions will be ‘read’ by the law and responded to by the government. That also goes for how the government responds to actions by others that concern us (criminal offences, breach of contract, invasion of privacy by a private company). But, as Dworkin argued, justice is more than mere consistency; it is rather about the integrity of the totality of legal rules, principles, and policies, ensuring that each decision is taken in accordance with the implied philosophy that grounds the law. Justice as fairness concerns two types of equality (as described by Aristotle): distributive and corrective. Distributive justice means that everyone should be treated in the same way, to the extent that similar conditions apply. Corrective justice means that punishment should be proportional to the seriousness of the crime and compensation proportional to the damage suffered. Clearly, both types of justice are related, as the determination of punishment or compensation must be aligned with the relevant crime (p.36) or tort as well as with the legal response with regard to similar crimes or torts. As indicated, Radbruch highlights that the goal of justice does not necessarily overrule the goals of legal certainty and instrumentality. If so, law would collapse into a moralistic enterprise.

  • Instrumentality refers to the fact that law is an instrument to achieve a variety of goals that are in part external to its own operations. These goals play out at the level of politics (legislation), where law is a policy instrument and at the level of individual legal subjects (including companies) who will use the law to strategically further and protect their own interests (private law) and their rights and freedoms (private law, criminal law, and legal remedies afforded in administrative law). Since the rise of independent courts in sixteenth to eighteenth-century Europe, law and politics have struck a historic bargain: law does not interfere in politics (where goals are to be determined by democratic legislation), while politics remains under the Rule of Law. This means that though law is instrumental in achieving the goals that a democratic legislature determines, it has its own values and goals that will constrain the ‘solution space’ of political goal-setting and its execution. Once again, Radbruch reminds us that the goal of instrumentality does not necessarily mean that law’s expediency will overrule justice and legal certainty. If so, ‘rule of law’ would collapse into arbitrary rule by law, and law’s instrumentality would reduce to instrumentalism.

The three goals of the law are constitutive of law and the ‘rule of law’ (they determine what counts as law), but they are also antinomian (they may be incompatible in concrete cases). When the Second World War ended, Radbruch wrote a brief text to explain how his antinomian goals relate to Nazi rule. The title of his text was: 5 Minutes of Legal Philosophy. He targets some of the maxims that were typical for the way that law was instrumentalized by Nazi Germany. First, the maxim of ‘an order is an order’ and ‘a law is a law’. He frames this as the equation of law with power. Second, the maxim of ‘law is what benefits the people’ and ‘whatever state authorities deem to be of benefit to the people is law’. This results in framing the private benefit of those in power as equivalent with public benefit. Instead of these populist maxims, he presents ‘law as the will to justice’ and ‘equality before the law’. He reiterates that law is determined by the antinomian goals of instrumentality, justice, and legal certainty, and adds that laws that do not even aim for justice do not merely forsake their validity within the system, but must be denied their legal character. This demonstrates the priority of fundamental principles of law that preclude mistaking brute force or arbitrary rule by law for the rule of law. (p.37)


On the concept of law

Hart, H.L.A. 1994. The Concept of Law. Oxford: Clarendon Press.

Hildebrandt, Mireille. 2015b. ‘Radbruch’s Rechtsstaat and Schmitt’s Legal Order: Legalism, Legality, and the Institution of Law’. Critical Analysis of Law 2 (1): [1].

Holmes, Oliver Wendell. 1997. ‘The Path of the Law’. Harvard Law Review 110: 991–1009.

Radbruch, Gustav. 2014. ‘Legal Philosophy’. In The Legal Philosophies of Lask, Radbruch and Dabin, translated by Kurt Wilk. Introduction by Edwin W. Patterson, 44–224. Twentieth Century Legal Philosophy Series 4. Boston and London: Harvard University Press.

Wesel, Uwe. 1985. Frühformen Des Rechts in Vorstaatlichen Gesellschaften. Umrisse Einer Frühgeschichte Des Rechts Bei Sammlern Und Jägern Und Akephalen Ackerbauern Und Hirten. Frankfurt am Main: Suhrkamp.

On the sources of law

Hage, Jaap, Antonia Waltermann, and Bram Akkermans. 2017. Introduction to Law. 2nd ed. New York: Springer, chapter 1.

On speech act theory

Austin, J.L. 1975. How to Do Things with Words. 2nd ed. Boston: Harvard University Press.

Searle, John. 1995. The Construction of Social Reality. New York: The Free Press.

On speech act theory in law

Hildebrandt, Mireille. 2015a. Smart Technologies and the End(s) of Law. Novel Entanglements of Law and Technology. Cheltenham: Edward Elgar.

MacCormick, Neil, and Ota Weinberger. 1986. An Institutional Theory of Law: New Approaches to Legal Positivism. Dordrecht, Boston and Hingham: D. Reidel Pub. (p.38) Co.; sold and distributed in the United States and Canada by Kluwer Academic Publishers.

On legal reasoning

Dickson, Julie. 2010. ‘Interpretation and Coherence in Legal Reasoning’. In The Stanford Encyclopedia of Philosophy, edited by Edward Zalta. http://plato.stanford.edu/archives/spr2010/entries/legal-reas-interpret/.

Dworkin, Ronald. 1982. ‘Law as Interpretation’. Texas Law Review 60 (2): 527–50.

Gigerenzer, Gerd, and Christoph Engel, eds. 2006. Heuristics and the Law. 1st ed. Cambridge: The MIT Press.

Hage, Jaap, Antonia Waltermann, and Bram Akkermans, eds. 2017. Introduction to Law. 2nd ed. New York: Springer, chapter 2.

On legal rights

Edmundson, William A. 2012. An Introduction to Rights. 2nd ed. Cambridge: Cambridge University Press.

Hohfeld, Wesley Newcomb. 1964. Fundamental Legal Conceptions, as Applied in Judicial Reasoning, edited by Walter Wheeler Cook with a new foreword by Arthur L. Corbin. New Haven: Yale University Press.

On the influence of the Snowden revelation on EU data protection law

Granger, M.-P., and K. Irion. 2014. ‘The Court of Justice and the Data Retention Directive in Digital Rights Ireland: Telling Off the EU Legislator and Teaching a Lesson in Privacy and Data Protection’. European Law Review 39 (6): 834–850.

On law, democracy, and the rule of law

Dworkin, Ronald. 1991. Law’s Empire. Glasgow: Fontana.

Radbruch, Gustav. 2006. ‘Five Minutes of Legal Philosophy (1945)’. Oxford Journal of Legal Studies 26 (1): 13–15. https://doi.org/10.1093/ojls/gqi042.

Taekema, Sanne. 2013. ‘The Procedural Rule of Law: Examining Waldron’s Argument on Dignity and Agency’. In Annual Review of Law and Ethics. The Rule of Law-Principle 21:133–46, edited by B.S. Byrd, J. Hruschka, and J.C. Joerden. Berlin: Dunckler and Humblot. http://papers.ssrn.com/abstract=2391228.

Waldron, Jeremy. 2008. ‘The Concept and the Rule of Law’. Georgia Law Review 43 (1): 1.


(1) 10-1259 US v. Jones (23 January 2012).

(2) Subsequent case law: Riley v. California, June 25, 2014, No. 13-132, 573 US, holding: ‘The police generally may not, without a warrant, search digital information on a cellphone seized from an individual who has been arrested.’ See http://www.scotusblog.com/case-files/cases/riley-v-california/. And, Carpenter v. United States, June 22, 2018, No. 16-402, 585 US, holding: ‘The government’s acquisition of Timothy Carpenter’s cell-site records from his wireless carriers was a Fourth Amendment search; the government did not obtain a warrant supported by probable cause before acquiring those records.’ See http://www.scotusblog.com/case-files/cases/carpenter-v-united-states-2/.

(3) CJEU, 8 April 2014, C-293/12 and C-594/12 (Digital Rights Ireland).

(4) In the United States and the United Kingdom lawyers will speak of legal powers, in continental Europe they speak of legal competences.