“The workers’ movement wasn’t defeated by capitalism, but by democracy,” said Mario Tronti. It was also defeated by failing to appropriate the substance of working-class power. What defines the worker is not his exploitation by a boss, which he shares with all other employees. What distinguishes him in a positive sense is his embodied technical mastery of a particular world of production. There is a competence in this that is scientific and popular at the same time, a passionate knowledge that constituted the particular wealth of the working world before capital, realizing the danger contained there and having first extracted all that knowledge, decided to turn workers into operators, monitors, and custodians of machines. But even there, the workers’ power remains: someone who knows how to make a system operate also knows how to sabotage it in an effective way. But no one can individually master the set of techniques that enable the current system to reproduce itself. Only a collective force can do that. This is exactly what it means to construct a revolutionary force today: linking together all the worlds and all the revolutionarily necessary techniques, shaping these into a historical force and not a system of government.