David Horowitz

American writer and political activist who moved from being a prominent New Left radical in the 1960s to becoming one of America's most prominent conservative commentators — a trajectory shaped by the murder of his colleague Betty Van Patter.

Edited Ramparts magazine, the most radical major American publication of the 1960s, before his conversion to conservatism after Betty Van Patter's murder — making him the defining figure of the neoconservative intellectual turn from the left.