The Biosphere Is Not a Great Preserver of Species

The average rate of extinction since the beginning of life on earth has been about ten species per year. The only reason that we have evolution by natural selection is because of changes in the environment. Almost the entire capacity of the earth's life support system for humans has been provided not for us, but by us using our ability to create new knowledge. Akaand so i just emphasizes how hostile the environment, the biosphere, the planet, is to organisms generally, and to human beings in particular.