This book was very well synthesized and brought together relevant information from many different fields. It was definitely worth my time to read. However, as a die-hard pessimist, I remain unconvinced that we're not all going to suffer severely from being on the downside of the peak oil bell curve and the upside of overpopulation. Many of the solutions offered in this book are entirely reliant upon capital investment. Who ever heard of investing capital for the betterment of humanity? In order for these solutions to work, people with money will either have to be convinced that these innovations will benefit them directly or will actually have to start having empathy. It's the rare entrepreneur who is both successful and empathic.