The essays in this volume deal with various aspects of the history of the revolutionary socialist current in the United States that came to be identified as "American Trotskyism". One of the most dynamic currents in the U.S. left from the late 1920s to the 1980s, deeply committed to working-class democracy and internationalism, it had an intellectual and political impact well beyond the number of its members. The essays in this volume offer the most definitive history of that movement to be produced so far, giving a sense of some of its most colorful personalities and outstanding achievements--as well as its serious limitations.