Returning to this graphic’s placement of Michel Foucault on the spectrum between Marx and Heidegger. Why? Recall Foucault’s own words:: “I am simply a Nietzschean.” And: “Heidegger has always been for me the essential philosopher.”*
Heidegger was a member of the National Socialist Party in the 1930s and 1940s. Foucault was a member of the French Communist Party in the 1950s. Hence, as the graphic suggests, he is splitting the difference between Commie and Nazi.
* Sources: Foucault Live (Interviews, 1961-1984). Edited by Sylvère Lotringer. New York: Semiotext(e), 1989, p. 470 and p. 471.
See also the episodes on Karl Marx, Martin Heidegger , and Michel Foucault in the Philosophers, Explained series.
(And why is Rand at the other end of the spectrum?)