Book excerpt: In May 1968, Gilles Deleuze was an established philosopher teaching at the innovative Vincennes University, just outside of Paris. Felix Guattari was a political militant and director of an unusual psychiatric clinic at La Borde. Their meeting was unlikely, and the two were introduced in an arranged encounter of epic consequence. From that moment on, Deleuze and Guattari engaged in a surprising, productive partnership, collaborating on several groundbreaking works, including Anti-Oedipus, What Is Philosophy? and A Thousand Plateaus. Francois Dosse, a prominent French intellectual, examines the prolific, if improbable, relationship between two men of distinct and differing sensibilities. Drawing on unpublished archives and hundreds of personal interviews, Dosse elucidates a collaboration that lasted more than two decades, underscoring the role that family and history--particularly the turbulence of May 1968--played in their monumental work. He also takes the measure of Deleuze and Guattari's posthumous fortunes and weighs the impact of their thought within intellectual, academic, and professional circles.