The Theory of Moral Sentiments

No book-club editions for a 1759 title. The most reliable tell is where the title-page stops: the first edition's title-page ends at 'The Theory of Moral Sentiments'. From the third edition (1767) onward, the title-page and contents add 'To which is added a Dissertation on the Origin of Languages' — Smith's 'Considerations concerning the First Formation of Languages', which had first appeared separately in The Philological Miscellany in 1761. A widely repeated error assigns that addition to the second edition of 1761; the sources consulted place it at the third edition of 1767. Accordingly, any Theory of Moral Sentiments whose title-page mentions the Languages dissertation, or which carries any edition statement, is 1767 or later.