FWIW, Thiel also makes an interesting connection between stagnation and the many recent speculative bubbles in "The Optimistic Thought Experiment".
This seems to be an interesting idea but seems to be off. A lot of historical bubbles have occurred. Many historical bubbles like the infamous Tulip bubble were by many metrics a lot larger than the modern bubbles.
SIAI benefactor and VC Peter Thiel has an excellent article at National Review about the stagnating progress of science and technology, which he attributes to poorly-grounded political opposition, widespread scientific illiteracy, and overspecialized, insular scientific fields. He warns that this stagnation will undermine the growth that past policies have relied on.
Noteworthy excerpts (bold added by me):
In relation to concerns expressed here about evaluating scientific field soundness:
Grave indictors:
HT: MarginalRevolution