Peter van Inwagen is a philosopher and professor at the University of Notre Dame and Duke University. Van Inwagen is a leading philosopher in contemporary metaphysics, philosophy of religion and philosophy of action.

Van Inwagen pioneered ideas in the philosophy of free will, in particular his defence that free will is not compatible with determinism. He is a former President of the Central Division of the American Philosophical Association and has delivered lecture series on his work over the years at many prestigious universities including Oxford University, Princeton, and St Andrews.