"Bill McKibben is not a person you'd expect to find handcuffed in the city jail in Washington, D.C. But that's where he spent three days in the summer of 2011, after leading the largest civil disobedience in thirty years to protest the Keystone XL pipeline. A few months later the protesters would see their efforts rewarded when President Obama agreed to put the project on hold. And yet McKibben realized that this small and temporary victory was at...