For some strange reason, we believe that anyone who lived before we were born was in some peculiar way a different kind of human being from any we have come in contact with in our own lifetime. This concept must be changed; we must realize in our bones that almost everything in time and history has changed except the human being.
If you get someone who looks after himself and those around him, that's a deep ecologist. He can talk philosophy that I understand. People like that don't poison things, they don't ruin things, they don't lose soils, they don't build things they can't sustain.