I think it's great that we have organisations like Greenpeace. In a pluralistic society we want to have people who point out all the problems that the Earth could encounter. But we need to understand that they are not presenting a full and rounded view.
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Then I realized that there is an indigenous presence in the Solar System. It's us. So then I got to wondering what would happen if a more technologically advanced society moved next door to us the way we moved next door to the American Indians.