German philosopher, economist, sociologist, journalist and revolutionary socialist
- "The philosophers have only interpreted the world, in various ways. The point, however, is to change it."
- Simple: The thinkers have only understood the world, in different ways. The point, however, is to change it.
- About the quote: It is engraved on his tomb.
- "Theses on Feuerbach" (1845), Thesis 11, MEW 3, S. 535