"I will never give explanations. Now you are completely alone with our secrets." With this attitude, Guy Debord, the protagonist of the Situationist International, has hitherto prevented a close examination of this grouping. She therefore remained as unknown as notorious. Roberto Ohrt presents for the first time a critical chronology of the Situationist International and its time, a pointed history of modern art since 1945 in the fields of painting, literature, film, architecture, action.