The End of the River

When it comes to climate-change-inspired threats, it is rising sea levels we hear most about. But if the oceans are, as Herman Melville put it, “the tide-beating heart of the earth,” rivers are its circulatory system. In the United States, there is no river more storied, symbolic, and vital than the Mississippi, and none, to use Mark Twain’s word, more lawless. The struggle to control it has been going on nearly as long as there has been human civilization on its banks, and the attendant dr...