Along the way, he won conservative admirers like Ronald Reagan, Henry Kissinger and Jeane Kirkpatrick, but jettisoned old friends from his liberal coterie -- New York writers and thinkers like Norman Mailer, Lillian Hellman and Irving Howe. “It was a really passionate intellectual life,” he told The New York Times in 2017. “It’s hard to imagine today, but people actually came to blows over literary disagreements.” Agree with him or not, in his 35 years at the helm of Commentary, published by the American Jewish Committee, he transformed the magazine from a distinguished journal of social and political criticism into...