Wherever you are in your response to the crises of the changing climate, the warming world, and the extinction of species at the hands of humans, you are not alone. And you are not powerless. As more and more of us acknowledge the looming catastrophe, this realization moves us from private despair to public demands, from personal angst to political activism. For unlike the dinosaur victims of the last mass extinction, we humans have more options than fight, flight, or freeze: we can figure out and fix what we've unwittingly unleashed.