Available here for the first time in English, "Reality and Its Order" is a remarkable philosophical text by Werner Heisenberg, the father of quantum mechanics and one of the leading scientists of the 20th century. Written during the wartime years and initially distributed only to his family and trusted friends, the essay describes Heisenberg’s philosophical view of how we understand the natural world and our role within it. In this volume, the essay is introduced by the physicist Helmut Re...