Business as usual is what’s doing us in.We live on a planet that finds itself rather suddenly in the midst of an enormous physical crisis. Because we burn so much coal and gas and oil, the atmosphere of our world is changing rapidly, and that atmospheric change is producing record heat. July was the hottest month we’ve ever recorded. Scientists predict with confidence that we stand on the edge of the sixth great extinction event of the last billion years. People are dying in large numbers and being left homeless; millions are already on the move because they have no choice.