Alister McGrath (born 1953) is a Northern Irish biologist and Christian apologist. He is a Professor of Historical Theology at Oxford University. He was a previous head of Wycliffe Hall, one of Oxford's religious Permanent Private Halls.
McGrath, a former atheist, is one of the world's leading critics of Richard Dawkins. He published a critique of Dawkins' book The God Delusion titled The Dawkins Delusion?. Another book of McGrath's is called The Twilight of Atheism, which chronicles the fluctuation of atheism throughout history.