Michel Foucault marked a turning point in contemporary thought. He is one of the most important philosophers of recent decades, whose influence continues to this day. In this groundbreaking book, Mitchell Dean and Daniel Zamora explore a pivotal period in his life and work, focusing on May 1975 when he experimented with LSD in the Californian desert—a fundamental experience that prompted him to re-examine his work and embark on new sexual, philosophical, and political explorations. Foucault and the End of the Revolution explores a turbulent era spanning from May '68 to his California experience, encompassing his discovery of neoliberal ideas, marked by his controversial flirtation with the Iranian Revolution, and traversed by his fluctuating relationship with the left. This is an essential book for understanding the world of a philosopher who, forty years after his death, remains undeniably relevant.