This lecture discusses key ideas from the 18th century philosopher Immanuel Kant's work of ethics, The Groundwork for the Metaphysics of Morals. Specifically it examines his discussion of what he calls "heteronomy" in moral theories other than his own. He examines empirical principles of morality, which include moral feeling and individual happiness, and rational principles of morality, which include perfection or divine command. To support my ongoing work, go to my Patreon site - www.patreon.com/sadler If you'd like to make a direct contribution, you can do so here - www.paypal.me/ReasonIO - or at BuyMeACoffee - www.buymeacoffee.com/A4quYdWoM You can find over 3,000 philosophy videos in my main YouTube channel - www.youtube.com/user/gbisadler Purchase Kant's Groundwork for The Metaphysics of Morals - amzn.to/2ZXPYGr