Lotta Continua
Potere Operaio ("Workers' Power") was a radical left-wing Italian political group, active between 1967 and 1973. (It shouldn't be confused with "Potere Operaio Pisano" which was one of the components of a competing revolutionary group, Lotta Continua.) Among the group's leaders were Antonio ('Toni') Negri, Nanni Balestrini, Franco Piperno, Oreste Scalzone and Valerio Morucci, who led its clandestine armed wing. It was part of the "workerist" movement ("operaismo"), leading to the later development of the Autonomist movement.