Nature no longer exists apart from humanity. Henceforth, the world we will inhabit is the one we have made. Geologists have called this new planetary epoch the Anthropocene, the Age of Humans. The geological strata we are now creating record industrial emissions, industrial-scale crop pollens, and the disappearance of species driven to extinction. Climate change is planetary engineering without design. These facts of the Anthropocene are scientific, but its shape and meaning are questions for politics-a politics that does not yet exist. After Nature develops a politics for this post-natural world.