This Very Short Introduction provides a new point of departure for our understanding of anarchism. Prichard describes anarchism as a lived set of practices, with a rich historical legacy, and shows how anarchists have inspired and criticised some of our most cherished values and concepts, from the ideals of freedom, participatory education, federalism, to important topics like climate change, and wider popular culture in science fiction. By locating the emergence and globalization of anarchist ideas in a history of colonialism and imperialism, the book links anarchism into struggles for freedom across the world and demonstrates that anarchism has much to offer anyone trying to envision a better future.