These three postulates of practical reason are required to make rational sense of the fact of moral obligation

Immanuel Kant (1724–1804) is the most important figure of the Enlightenment in Germany, but his project is different in many ways from those of his French contemporaries. He was brought up in a pietist Lutheran family, and his system retains many features from, for example, Crusius. But he was also indebted through Wolff to Leibniz. Moreover, he was ‘awoken from his dogmatic slumbers’ by reading Hume, though Kant is referring here to Hume's attack on causation, not his ethical theory (Prolegomen