This book is considered a legacy of Heinz von Foerster, a work into which he poured the full weight of his 90 years of life with the support of Monika Bröcker. It conveys not only the life story and the key thoughts of the Socrates of Cybernetics but also firsthand accounts of world and science history. Von Foerster was a gifted storyteller, and what he did not describe himself, Monika Bröcker brought to light in the conversational passages with her equally insightful and empathetic questions. In this way, the two of them manage to provide entertaining explanations of even complex topics almost incidentally.