Al escribir en 1939–40, Trotsky responde a elementos dentro del movimiento obrero revolucionario que se replegaban de la defensa de la Unión Soviética ante el ataque imperialista que se cernía. Explica por qué solo un partido que luche por integrar a números crecientes de trabajadores a sus filas y a su dirección puede mantener un firme curso revolucionario.Prefacio a la cuarta edición por Doug Jenness, introducción a la segunda edición por George Novack y Joseph Hansen, glosario, notas, índice. Apendices por James Burnham: Ciencia y estilo: Una respuesta al camarada Trotsky, Carta de renuncia al Partido Obrero. Writing in 1939-40, Leon Trotsky replies to those in the revolutionary workers movement who were beating a retreat from defense of the Soviet Union in face of looming imperialist assault. He describes how the rising pressures of bourgeois patriotism in the middle classes during Washington's buildup to enter the spreading imperialist war in Europe were finding an echo even inside the communist movement. And he explains why only a party that fights to bring growing numbers of workers into its ranks and leadership can steer a steady revolutionary course.Introductions by George Novack and Joseph Hansen, appendices by James Burnham: Science and Style: A Reply to Comrade Trotsky, Letter of Resignation from Workers Party. Notes, glossary, index.