"Existentialism is a "movement" which like all such movements has a flabby periphery and a hard center. That center is the thought of Heidegger. To that thought alone existentialism owes its importance or intellectual respectability. There is no room for political philosophy in Heidegger's work, and this may well be due to the fact that the room in question is occupied by gods or the gods."
January 1, 1970
https://en.wikiquote.org/wiki/Martin_Heidegger