Von der coactio hypothetica zum kategorischen Imperativ: Was Kants Autonomie-Lehre Achenwalls Naturrecht von 1755 verdankt
In the first edition of his textbook on Natural Law (1750), Achenwall advocates a theory of obligation which reveals that he was a Wolffian before he came from Halle via Marburg to Göttingen in 1748: Obligation is essentially the connection of a free action with a motive. With the third edition of the textbook (1755), Achenwall changes in terms of obligation theory to the camp of the Pufendorfians, who understood obligation essentially as a relationship between two wills, that of the obliged and that of a superior obligor (whereby in natural law God is this obligor). Achenwall herewith explicitly joins the Wolff-criticism of his Göttingen predecessor Gottlieb Samuel Treuer, who in turn followed Jean Barbeyrac. It is this ‘Pufendorfian’ Achenwall - but not the ‘Wolffian’ of 1750 - according to whose textbook Kant gives his lectures since the 1770s. However, in 1785, in the Groundwork, Kant replaces the divine will by the pure legislative will of the obligated person himself: Autonomy replaces Theonomy - and Wolff’s idiosyncratic concept of ‘obligation as motivation’ finally drops out of the game again.