Smith returned to Glasgow in 1751 to occupy the Chair of Logic, and within a year moved to that of moral philosophy. In his logic course, he substituted for the Aristotelian treatment his system of rhetoric and criticism, which he believed explained and illustrated best the powers of the mind. His moral philosophy course was a four‐part one, covering natural theology, presenting empirical proofs of the existence and attributes of God; Ethics, which gave rise to TMS; Justice, covering a history of civil society, taking up the theme of human progress through the four socio‐economic stages of hunting and fishing, herding, farming, and commerce; and, in essence, Political Economy, the basis for WN. Two surviving sets of lectures on Jurisprudence, combining parts three and four of the moral philosophy course, are discussed to demonstrate the growing sophistication of Smith's economic analysis during his Glasgow professorship.