Perhaps unfortunately, Man is now a large part of natural progression. I dont think we really can say with any accuracy what is mother natures job or that "she" has intentions. Very much of what we call nature is under mans influence. What we do is influencing survival of our chosen species. We have assumed the power to control the future but we certainly dont seem to have much forward vision. We can interfere with what might have been. Should we? Will we? Is there any chance of concensus about these options? I think we know the answer to that. Hand wringing is what we are doing but I dont have any suggestion about what else we really can do. Jump in front of the bulldozers?