Actually, we're already breaking it. We're starting to decarbonize. The only question is whether we'll do it fast enough to avoid planetary catastrophe which, granted, is an important question. I'm not arguing for a don't worry-be-happy attitude. We should worry! But we're not doomed. The Stone Age didn't end because we ran out of stones, and the carbon age will end when alternatives are more attractive than carbon. The happy news is that we've reached the beginning of that end.