The second industrial revolution isn't sunsetting; it's actually on life support. Fossil-fuel energies are getting more expensive. We're going to the more exotic fossil fuels like tar sands, heavy oil and shale gas, and prices are volatile on the world market, destabilizing the global economy. The whole general-purpose technology platform -- all the technologies that emerged with that energy regime, like the internal combustion engine and centralized electrification -- have exhausted their productivity. We can't get anything out of their S curve anymore. We've maxed out.