'People can only be free in relation to one another.'Three exhilarating and inspiring essays in which the great twentieth-century political philosopher argues that there can be no freedom without politics, and no politics without freedom.One of twenty new books in the bestselling Penguin Great Ideas series. This new selection showcases a diverse list of thinkers who have helped shape our world today, from anarchists to stoics, feminists to prophets, satirists to Zen Buddhists.