Critical political theory has been transformed since the declaration of the Anthropocene in the early 2000s. However, a substantive account of a planetary politics, which begins by understanding politics as planetary - as opposed to politics applied to the planet - is yet to be developed. Planetary Politics: Arendt, Anarchy and the Climate Crisis offers precisely such an account of political theory. Rereading the key works of Hannah Arendt, it suggests that Arendt was a theorist of the planet and that claims of hers, such as the fact that 'plurality is the law of the earth, ' have been radically overlooked. Recovering these moments in Arendt's writing, this book makes the case for a planetary anarchism and the restaging of revolutionary politics.