For 15 years, Henri Bergson taught at the Collège de France. Speaking without notes, most of his classes are now lost to history, but records of a handful of courses fortuitously survived thanks to stenographic transcripts. Conveying Bergson's very voice, these extraordinary documents are finally presented here in English. The 1904-5 lectures are dedicated to the topic of freedom, or as Bergson put it, "the evolution of the problem of freedom." Building on the philosophy of freedom from his first book, Time and Free Will he proposes that freedom is not only a fundamental human experience but characteristic of all life as such. Through rich commentaries on ancient and modern philosophers, Bergson demonstrates the need for, and the radically new character of, his own theory of freedom.