The year was 1969. In a Chicago courthouse, David Dellinger, one of the Chicago Eight, stood trial for conspiring to disrupt the National Democratic Convention. Dellinger, a long-time but relatively unknown activist, was suddenly, at fifty-three, catapulted into the limelight for his part in this intense courtroom drama.

From obscurity to leader of the antiwar movement, David Dellinger is the first full biography of a man who bridged the gap between the Old Left and the New Left. Born in 1915 in the upscale Boston suburb of Wakefield to privilege, Dellinger attended...