Probably start with Abundance since they wrote that one first. Then read BOLD. They are optimist but not without reason. They give numerous examples of how our world is changing from one of materials to one of ideas. Example: cell phone. Maybe you're young and can't remember a time where there was no cell phone. But I can see how many things the cell phone has replaced which in turn has saved a lot of material resources. Apps are nothing but ideas that help solve a problem. Eric Schmidt said on the back cover that, "Abundance showed us where our world can be in 20 years, BOLD is a roadmap for entrepreneurs to help us get there." Hoped that helped.