David Horowitz was born in Forest Hills, N.Y., on January 10, 1939, the year of the Nazi–Soviet non-aggression pact, which shattered the illusions of many Communists and other members of the progressive Left. But Horowitz’s schoolteacher parents, Blanche and Phil, remained steadfast in their commitment to the party. They had met in Communist gatherings in the early 1930s and engaged in what turned out to be a lifelong “political romance,” as David later described it in his autobiography, Radical Son, thinking of themselves as “secret agents” of the Soviet future.
http://www.nationalreview.com/article/426812/david-horowitz-journey-left-right