Tools are likely far less important for the development of modern humans than we like to imagine. In fact, for more than 300,000 years tools barely changed at all. What made the difference was genetic changes in various grasses that enabled humans accidentally to create agriculture, which led for the first time in history to surplus food, which in turn enabled gradual specialization. From 13,000 years ago to today, technology has progressed more than in the previous several hundred thousand years. So it was really agriculture - and the invention of fungible tokens - that made the big difference.