Antonio Negri was born in Padua in 1933. He is one of the world's leading experts on Marxism and was crucial in elaborating the theories of "workerism", and in founding the political groups "Potere operaio" and "Autonomia operaia." He was arrested in 1979 and accused of being part of the Red Brigades. He was then found guilty of being "morally responsible" for the existence of the group. An exile in France for 14 years, Negri returned to Italy in 1997.