The past 150 years has seen more innovation and invention since people started, well, innovating and inventing. But what made all this possible? If you’re curious about how the world you live in came to be, check out this two page executive summary of a wonderful new book “How We Got to Now: Six Innovations that Made the Modern World” The author makes a compelling case that six basic innovations have made possible all the others we have come to rely on. This book will also be presented as a PBS Series starting on October 15.