 Gertrude Elizabeth Margaret Anscombe was one of the most important philosophers of the twentieth century. She worked on an unusually broad array of topics: the entire range of the history of philosophy (ancient, medieval, modern, recent), metaphysics, epistemology, philosophy of language, philosophy of mind/psychology, philosophy of action, moral philosophy, political philosophy, and the philosophy of religion. As a result, this entry will have to be very selective. Despite the fact that her work is often cryptic and difficult, it greatly influences philosophers working in action theory, moral philosophy, and the philosophy of mind. Like the work of her mentor Ludwig Wittgenstein, studying Anscombe’s work generates insight after study and struggle.