 But Enlightenment philosophy was not univocal in its comparatively permissive attitudes toward suicide. The most noteworthy opponent of suicide in this period was Immanuel Kant. Kant’s arguments, though they reflect earlier natural law arguments, draw upon his view of moral worth as emanating from the autonomous rational wills of individuals (Cholbi 2000, 2010). For Kant, our rational wills are the source of our moral duty, and it is therefore a kind of practical contradiction to suppose that the same will can permissibly destroy the very body that carries out its volitions and choices. Given the distinctive worth of an autonomous rational will, suicide is an attack on the very source of moral authority.