I really appreciate this superbly concise summary about the state of knowledge in development economics--I have never seen the state of the art distilled so completely in one easy-to-grasp short essay. I think it also does an admirably realistic job of pointing out the real pitfalls in political systems and the risks of the "resource curse." My question is how agriculture and environmental services fit into this picture--are not increasing agricultural productivity and stable environmental services key preconditions for the big push into industrialization and raising TFP with a few exceptions like Singapore? And aren't the lack of agricultural productivity increases and stable environmental services still the main constraints to poverty-reduction in Sub-Saharan Africa? I wonder where development economics sees agriculture and environment at this juncture. Thanks for the excellent blog and look forward to learning more here in the future.