Russ Roberts: Kevin Kelly's latest book is The Inevitable, Understanding the Twelve Technological Forces that will shape our future. We're going to try to touch on all 12 trends, but we'll see where we go. Why are you so optimistic about the present and the potential for the future? Because I read a lot of history,. It seems to me that if you look at what's really going on, we should be very optimistic about the improvements we have.