Understandings of freedom are often discussed in moral, theological, legal and political terms, but they are not often set in a historical perspective, and they are even more rarely considered within their specific language context. From Homeric poems to contemporary works, the author traces the words that express the various notions of freedom in Classical Greek, Latin, and medieval and modern European idioms. Examining writers as varied as Plato, Aristotle, Luther, La Boétie, Hobbes, Rousseau, Kant, Stirner, Nietzsche, and Foucault among others, this theoretical mapping shows old and new boundaries of the horizon of freedom. The book suggests the possibility of transcending these boundaries on the basis of a different theorization of human interactions, which constructs individual and collective subjects as processes rather than entities.