[Man and his environment. Introduction with historical analysis].

This historical analysis, given at the 109th Meeting of the German Society of Naturalists, Scientists and Physicians was intended as an introduction to the day assigned to the Medical Section of the Society. The following topics were dealt with: (1) the claim of science and scientists of the 19th Century to establish absolute norms by scientific methods, (2) the change of paradigm of modern sciences during the last hundred years, (3) the profound changes concerning "Man and His Environment", which was the general topic of the meeting.