Using Fritz Perls as an example, this book recalls the representatives of an urban avant-garde culture who were driven out of Europe, emigrated, and for the most part found a new homeland in the USA. Many elements of the lost avant-garde spirit later found their way back to Europe in an enriched form. This monograph is the first to focus in greater depth on the German-European roots of Gestalt therapy, thereby bridging the continents at the same time.