The climate problem is getting worse but the solutions are getting better. So far, no technology has done more for improving the solutions available to address climate change than solar photovoltaics (PV). The costs of solar PV modules have fallen by more than a factor of 10,000 since they were first commercialized and, in sunny places, are now cheaper than any other form of electricity. This book describes an array of driving forces leading us toward a solar-centric energy system, one where solar power lies at the core rather than at the edge.