We have seen the best of our times/ the weather for the past hundred or two hundred years has been mild; food is plentifull; water is available; there is enough wealth so that a decent percentage of us can live without fear of starving or some other catastrophe. But if natural history tells us one thing it is that nothing stays in stasis; everything is in flux. From 1950 until 2000 are the best 50 years we may ever see.