Modality, morality and belief are among the most controversial topics in philosophy today, and few philosophers have shaped these debates as deeply as Ruth Barcan Marcus. Inspired by her work, a distinguished group of philosophers explore these issues, refine and sharpen arguments and develop new positions on such topics as possible worlds, moral dilemmas, essentialism, and the explanation of actions by beliefs. Together, this collection honors one of the most rigorous and iconoclastic of philosophical pioneers.
Walter Sinnott-Armstrong (born 1955) is an American philosopher specializing in ethics, epistemology, neuroethics, the philosophy of law, and the philosophy of cognitive science. He is a Professor of Practical Ethics in the Department of Philosophy and the Kenan Institute for Ethics at Duke University.