Iris Murdoch, Mary Midgley, Philippa Foot and Elizabeth Anscombe were philosophy students at Oxford during the Second World War when most male undergraduates (and many tutors) were conscripted. Taught by refugee scholars, women and conscientious objectors, the four friends developed a philosophy that could respond to the war's darkest revelations. How, they asked, do we find our way through the darkness of what we have created?