Johanna "Hannah" Arendt was a German-American political theorist. Though often described as a philosopher, she rejected that label on the grounds that philosophy is concerned with "man in the singular" and instead described herself as a political theorist because her work centers on the fact that "men, not Man, live on the earth and inhabit the world." Arendt's work deals with the nature of power, and the subjects of politics, authority, and totalitarianism.