In the months before World War II, an Oxford don by the name of C. S. Lewis wrote, “Good philosophy must exist, if for no other reason because bad philosophy needs to be answered.” Lewis’s students questioned the importance of studying the humanities and sciences with war on the horizon. But Lewis understood, as he wrote so beautifully in his classic book Weight of Glory, that “To be ignorant and simple now . . . would be to throw down our weapons and to betray our uneducated brethren who have, under God, no defense but us against the intellectual attacks...