To be an environmentalist early in the twenty-first century is always to be defending, arguing, acknowledging the hurdles we face in our efforts to protect wild places and fight climate change. But let's be honest: hedging has never inspired anyone. So what if we stopped hedging? What if we grounded our efforts to solve environmental problems in hope instead, and let nature make our case for us? That's what George Monbiot does in Feral, a lyrical,...