‘Intellectual Proletarians’ by Emma Goldman from 1914 is rather timely, as more people are affected by “the changes taking place in workers’ labor processes […], where the skills involved in direct labor are increasingly skills involving cybernetics and computer control” .
Emma Goldman (1869-1940) was a “leading figure in international anarchism and feminism, a passionate advocate of free speech, birth control, and worker’s rights.” 
“This terrible dependence upon those who can make the price and dictate the terms of intellectual activities, is more degrading than the position of the worker in any trade.” 
 Maurizio Lazzarato, ‘Immaterial Labour’, 1996
 The Emma Goldman Papers Project at UCB (University of California, Berkeley)
 Emma Goldman, Intellectual Proletarians, in Mother Earth 8, no. 12 (February 1914): 363–370.