Ernest Ezra Mandel was a German born Belgian-Jewish Marxian economist and a Trotskyist activist and theorist. He fought in the underground resistance against the Nazis during the occupation of Belgium and he became a member of the Fourth International during his youth in Antwerp. Mandel is considered to be populariser of marxism.
A bit dated and now out of print, but I think Mandel's idea about "the proletarianization of intellectual labor" is actually more relevant than when he wrote it.