Ecologists often speak of the 'evolution of environments' over and above the evolution of organisms. For man did not appear on earth until the earth itself, together with all its biological forms, had evolved to a certain degree of balance and complexity. At this point of evolution the earth 'implied' man, just as the existence of man implies that sort of a planet at that stage of evolution. The balance of nature, the 'harmony of contained conflicts,' in which man thrives is a network of mutually interdependent organisms of the most astounding subtlety and complexity. Teilhard de Chardin has called it the 'biosphere,' the film of living organisms which covers the original 'geosphere,' the mineral planet. Lack of knowledge about the evolution of the organic from the 'inorganic,' coupled with misleading myths about life coming 'into' this world from somewhere 'outside,' has made it difficult for us to see that the biosphere arises, or goeswith, a certain degree of geological and astronomical evolution. But, as Douglas E. Harding has pointed out, we tend to think of this planet as a life-infested rock, which is as absurd as thinking of the human body as a cell-infested skeleton. Surely all forms of life, including man, must be understood as 'symptoms' of the earth, the solar system, and the galaxy—in which case we cannot escape the conclusion that the galaxy is intelligent.

• life
• body
• nature
• existence
• knowledge
• evolution
• balance