"Some believe that we will eventually sink back to the more simple-minded creatures which we evolved out of and the planet will bring another mind forward." "Isn't that the opposite of evolution?" "Only from a single-species perspective. A planet's life is paramount. It is such a fragile rare event, it should be treasured and nurtured for the potential it brings forth. If that means abdicating our physical dominance for our successors, then that is what we will accept. Such a time is a long way in our future. In terms of evolution, we have only just begun such a journey."