Many religions have a concept of environmental stewardship that says humans have been given responsibility for the environment and other animals by a creator. Ethical Humanism embraces the theory of unguided evolution. Yet many Ethical Humanists are strong environmentalists. What is the basis for the Ethical Humanist environmental ethic? How do we decide ecological ethical questions? Some people argue that humans have been so harmful to the environment that the earth would be better off without humans; is this really true?