A sharply detailed, panoramic memoir of a ""red diaper"" baby and leftist activist who converted to political conservatism. Born in 1939, journalist and biographer Horowitz (The Fondas, 1992; with Peter Collier, The Roosevelts, 1994; etc.) here turns in a study of intellectual development in a troubled time. He writes lovingly, but with some exasperation, of having been brought up by two Communist Party minor operatives; of a father physically and emotionally scarred by his own impoverished childhood, blacklisted and forced to leave teaching in the 1950s; of a mother who was trained as a lawyer but worked as a typing instructor, fearful of competing for work during the Great Depression. Horowitz continued their revolutionary tradition through the '60s and '70s, finally rejecting the left during the beleaguered Carter presidency. Along the way he recounts his years as an antiwar-movement leader and journalist (he was an editor at Ramparts magazine) and as an active sympathizer of the Black Panthers, with whom he later broke. Horowitz traces his disaffection to multiple causes, including the lunatic acts of violent groups like the Weather Underground and the lunatic rhetoric of the late-era Huey Newton, who called for the extermination of the ""fascist insects"" who stood in his way. He protests, however, that he did not, as one writer has charged, ""escape into conservatism,"" and that, like Norman Podhoretz, he had to accept the label ""neoconservative"" because his preferred term, ""liberal,"" had been coopted by the left. Horowitz is usually generous in his description of peers in the movement, although he clearly dislikes Tom Hayden and Todd Gitlin, and he is more likely to engage in self-criticism than to deride those who, in his view, have not yet seen the light. Regardless of one's opinion on his present politics, Horowitz's searching reminiscences are a valuable contribution to the literature of dissent.