I am writing a book! If you want to know when it is ready (and maybe win a free copy), submit your email on my website: I won’t spam you or share your email address with anyone. This is a lecture about version of the Kantian Categorical Imperative called "The Formula of the End in Itself." The lecture is based on a presentation of Kant's moral theory given by Onora O'Neill. The lecture concludes with a comparison between Kant's duty-based or deontological moral theory (sometimes called, simply, "Deontology"), on the one hand, and Utilitarianism, on the other.