Hooray for Global Warming

Or climate change, or climate disruption, or whatever else they are calling it.  All along I wondered why we automatically assumed the world getting warmer was a bad thing.  I know, melting glaciers and stranded polar bears.  But still, time and again our old history books pointed to warming trends as moments when humans were able to grow more food and cultivate more land for livestock and agriculture.  Still, the really smart people in lab coats insisted that the very presence of humans and cow flatulence was hurdling us toward a global disaster of biblical proportions.  Except, apparently, when Global Warming is actually saving us.  So there you go.  Everything that happens proves Global Warming, and Global Warming causes everything to happen.  How can sane men ever argue?