As we move past another Earth Day, environmentalists may be forgiven for assuming that little has changed. The best available evidence points to a rapidly changing climate, declining biodiversity, and fisheries on the verge of collapse. To further complicate matters, the political will to reverse these trends is being stymied by a surge of anti-environmental populism in America, Brazil and elsewhere. When coupled with the continued harvesting of natural resources by big multinational corporations, it is easy to see why environmentalists are crying into their organic kale and quinoa bowls.