“Is Man a Myth?” asks the title of one of Mr. Tumnus’s books. It was apparently an open question in Narnia during the Long Winter, and it has become so again for us. In Mere Humanity, Donald T. Williams plumbs the writings of three beloved Twentieth-Century authors to find answers that still resonate in the Twenty-First. Chesterton, Lewis, and Tolkien explain in their expositions and incarnate in their fiction a robust biblical doctrine of man that gives us a firm place to stand against the various forms of reductionism that dominate our thinking about human nature today.