I'm getting two birds with one stone here. I read Tyler Cowan's e-book and being late to review it, I now have the benefit of David Brooks's review. Cowan's argument that we have picked a great deal of the "low-hanging fruit", makes a lot of sense to me. Certainly our economy has changed a great deal, but have I lived through the changes that my parents or grandparents lived through? Personal computers and the internet have changed a great deal, but I don't know if the changes are as profound as those of the period 1850 to 1950.
Brooks makes a good point: our quality of life may have improved, although not our wealth necessarily.
Both sources provide thoughtful commentary on our current position.