We've heard a lot this week about how the floods in the Midwest might be an act of humans -- or an act of City Council, as one Iowan leader put it. We can start the futile cycle of fighting Mother Nature again if we want to: spend billions of dollars on levees and flood control infrastructure, encouraging development of river floodplains and low-lying wetlands, then watch those homes and businesses be overrun by flood water. We saw it with the Mississippi floods in 1993, which caused billions in damages and forced tens of thousands from their homes. Now, here …