Hal Draper, " The Two Souls of Socialism https://www.marxists.org/archive/draper/1966/twosouls/index.htm," New Politics 5, no. 1 (Winter 1966), 57-84.
Hal Draper was an American socialist activist and author who played a significant role in the Berkeley, California Free Speech Movement. He is known for his extensive scholarship on the history and meaning of the thought of Karl Marx.
Draper was a lifelong advocate of what he called "socialism from below", self-emancipation by the working class, in opposition to capitalism and Stalinist bureaucracy, both of which, he held, practiced domination from above. He was one of the creators of the Third Camp tradition, a form of Marxist socialism.
Wikipedia
Hal Draper, " The Two Souls of Socialism https://www.marxists.org/archive/draper/1966/twosouls/index.htm," New Politics 5, no. 1 (Winter 1966), 57-84.