These hard to prove theories, such as Jared Diamond's and in the reviewed book, exist in large part to counter the highly convincing and data driven eugenic the

These hard to prove theories, such as Jared Diamond's and in the reviewed book, exist in large part to counter the highly convincing and data driven eugenic theories. The eugenic and IQ based theories are politically unacceptable. "A Farewell to Alms" and "IQ and the Wealth of Nations" lay out very convincing and heavily researched cases that explain different national economies very well. The explanations are just not PC.