The campus culture war is a religious war, a so-far largely peaceful counterpart to the violent purges and revolutions of jihad. One faith has been expunged, relegated to the margins of the academy, and now another fills the vacuum. Out with the Christianity that spawned American higher education, in with a ferocious new faith — a social-justice progressivism unrestrained by humility and consumed with righteous zeal. Contemporary Americans — educated in the kind of revisionist history that dominates our educational system from top to bottom — forget that higher education was initially a thoroughly Christian enterprise, in keeping with the...