From his conducting debut in 1943 until his death in 1990, Leonard Bernstein's star blazed brilliantly. But always twinkling within that star were the yearnings of a true progressive. In his new biography Leonard Bernstein: The Political Life of an American Musician, Barry Seldes, links Bernstein's real musical and theatrical achievements and some of his real setbacks, to to his involvement with progressive politics. We see the nexus between Bernstein's career and some of the twentieth century's most momentous events. His life shows us the unique intersection of American culture and political power. My conversation with Barry Seldes.