Anthony Clifford "A. C." Grayling is a British philosopher. In 2011 he founded and became the first Master of New College of the Humanities, an independent undergraduate college in London. Until June 2011, he was Professor of Philosophy at Birkbeck, University of London, where he taught from 1991. He is also a supernumerary fellow of St Anne's College, Oxford.
Grayling is the author of about 30 books on philosophy, including The Refutation of Scepticism, The Future of Moral Values, The Meaning of Things, The Good Book, and The God Argument. He is a Trustee of the London Library, a Fellow of the Royal Society of Literature and a Fellow of the Royal Society of Arts.
He is a director and contributor at Prospect Magazine. His main academic interests lie in epistemology, metaphysics and philosophical logic. He has described himself as "a man of the left" and is associated in Britain with the new atheism movement, and is sometimes described as the 'Fifth Horseman of New Atheism'. He frequently appears in the British media discussing philosophy.