A handbook for workers coming into the factories, mines, and mills as they react to the uncertain life, ceaseless turmoil, and brutality of capitalism today. A handbook for young people who, in growing numbers, are repelled by racist discrimination, women’s inequality, national oppression, and other reactionary social relations reproduced daily by capitalism. A book for fighters who sense that this social system, if not replaced, will lead to ruin, fascism, and war. Above all, it aims to show why only the working class can lead humanity out of the social crisis endemic to capitalism in its decline and how millions of workers, as political resistance grows, will revolutionize themselves, their unions, and their conditions of life and work.