George Braziller published a new edition of Ludwig von Bertalanffy’s “General System Theory” (GST) – a collection of publications representative for the life work of the father of a new approach to the understanding of the world and of a new practice for intervening in the world. That publication is an indication for the lasting and even recently increased interest of the public in the foundations of GST that ushered in a paradigm shift. The Bertalanffy Center was asked to provide an up-to-date foreword.