Albert Einstein, Sigmund Freud and Robert Musil are the three geniuses who inspired the renaissance of a Western world drowning in mud and blood after the carnage of the First World War? This book deals with their crossing destinies as well as the individual itinerary of Albert Einstein. For it is useless to separate the sciences from thought, the arts from political action, if one seeks to understand anything about the fabulous and tragic era which was the 20th century.