Beginning in the 1950s, William F. Buckley Jr. emerged as a towering figure in American conservatism—founding National Review magazine, shaping political discourse on television, and mentoring a new generation of conservative leaders including Ronald Reagan. Buckley’s selected biographer, Sam Tanenhaus, unpacks his multifaceted legacy, exploring his influence on American politics and media, his ideological battles, and the complex, often-surprising life of a man who left an enduring mark on American public life.