Totally, we have used up our natural resources, over populated the planet and im sure we are on the downward spiral into extinction, regardless of medical breakthroughs we are rapidly running out of territory, we have decimated and made extinct various species, we have upset the natural order, introduced species where they shouldn't be and caused environmental problems. Our desire for oil has caused enviromental disasters, we have attacked the ozone layer, polluted the air and made it poisonous and as you say, natural evolution has been our own worst enemy............but saying that i enjoy m