"Right or wrong, or perhaps somewhere in between, Clark's is about as stimulating an account of world economic history as one is likely to find. Let's hope that the human traits to which he attributes economic progress are acquired, not genetic, and that the countries that grow in population over the next 50 years turn out to be good at imparting them. Alternatively, we can simply hope he's wrong."—Benjamin M. Friedman, New York Times Book Review
