I’ve read some of Brad DeLongs stuff over the years. Might have to get his new book. Predicting beginnings and endings in history seems to be a bit arbitrary, but I do see (in my own world) an end, or at least a plateauing, of the computing and telecommunications technology cycle that probably began with the telegraph. Myself, I see clean energy as the next big wave, but who really knows?

The Economist Who Knows the Miracle Is Over