In the early 1950s, a young Harvard professor named Henry Kissinger approached the FBI with alleged evidence of communist subversion among the foreign students of his summer seminar. His evidence was a flyer criticizing the nuclear arms build-up and promoting world peace. At the same time at Yale, young William F. Buckley, Jr., was discovering more than God while writing God and Man at Yale as an undergraduate. He was discovering J. Edgar Hoover...