Man is now standing on the threshold of the third millenium. In answering the critical question „What way?“ he should find himself and learn to live as a human being. This is the challenge of the current unprecedented global ecological crisis. For the ecological crisis is first of all the crisis of man’s humanity. While the true existence of the individual concerns his communication with other human beings, his true existence as a species should be the interspecies communication. Respect for life is thus the prerequisite of human existence.