Workerism is a political theory that emphasizes the importance of or glorifies the working class. Workerism, or , was of particular significance in Italian left-wing politics. As revolutionary praxis Workerism (or ) is a political analysis, whose main elements were to merge into autonomism, that starts out from the power of the working class. Michael Hardt and Antonio Negri, known as operaist and autonomist writers, offer a definition of , quoting from Marx as they do so: builds on Marx's claim that capital reacts to the struggles of the working class; the working class is active and capital reactive. Technological development: Where there are strikes, machines will follow. "It would be possible to write a whole history of the inventions made since 1830 for the sole purpose of providing capital with weapons against working-class revolt." (Capital, Vol. 1, Chapter 15, Section 5) Political development: The factory legislation in England was a response to the working class struggle over the length of the working day. "Their formulation, official recognition and proclamation by the State were the result of a long class struggle." (Capital, Vol. 1, Chapter 10, Section 6) takes this as its fundamental axiom: the struggles of the working class precede and prefigure the successive re-structurations of capital. The workerists followed Marx in seeking to base their politics on an investigation of working class life and struggle. Through translations made available by Danilo Montaldi and others, they drew upon previous activist research in the United States by the Johnson-Forest Tendency and in France by the group . The Johnson-Forest Tendency had studied working class life and struggles within the Detroit auto industry, publishing pamphlets such as "The American Worker" (1947), "Punching Out" (1952) and "Union Committeemen and Wildcat Strikes" (1955). That work was translated into French by and published, serially, in their journal. They too began investigating and writing about what was going on inside workplaces, in their case inside both auto factories and insurance offices. The journal ("Red Notebooks", 1961–5), along with its successor ("Working Class", 1963–6), both founded by Negri and Tronti, developed workerist theory, focusing on the struggles of proletarians. Associated with this theoretical development was a praxis based on workplace organising, most notably by Lotta Continua. This reached its peak in the Italian "Hot Autumn" of 1969. By the mid-1970s, however, the emphasis shifted from the factory to "the social factory"—the everyday lives of working people