If such a thing as a literary/political/intellectual left exists, it is defined by its capacity for imaginative and sympathetic reach—by its willingness to surmount barriers of difference (class, distance, nationality) and agitate for a more equitable distribution of the goods and goodnesses that make up our idea of human (and nonhuman) well-being. To be able to imagine what it might be like to be tortured, or to live in abject poverty, or under the watchful eyes of US Predator drones—this capacity is crucial to the project of any political left in a wealthy country. But in the case of global warming, our collective imagination has failed us utterly.