More at https://www.philosophytalk.org/shows/philippa-foot. Philippa Foot invented the thought experiment that famously became known as the Trolley Problem. Despite the vast industry of “trolleyology” it inspired, Foot’s goal to illuminate debates on abortion and euthanasia often gets lost in the mix. So, how did Foot use this thought experiment to distinguish between doing versus allowing? What did she mean by the "Doctrine of Double Effect"? Why did she think that cultivating classic virtues—justice, courage, prudence, and temperance—was in our own rational self-interest? And what made her later change her mind? Josh and Ray explore her life and thought with John Hacker-Wright from the University of Guelph, author of "Philippa Foot's Moral Thought."