"Endorsement From J. Phillippe Rushton Fellow, John Simon Guggenheim Foundation Professor of Psychology, University of Western Ontario: [A] brilliant integration of economics and psychology that illuminates the nexus between mental ability on the one hand, and national wealth, industrial productivity, and well being, on the other. This is a book that social scientists, policy experts, and global investment analysts cannot afford to ignore....Richard Lynn and Tatu Vanhanen's thesis is stunningly engineered to allow for no error of inference and no possible outcome than the correct one, strangely overlooked until now...IQ and the Wealth of Nations does for the study of human diversity and achievement among nations what The Bell Curve did for IQ and achievement in the USA.
Lynn and Vanhanen test the hypothesis on the causal relationship between the average national intelligence (IQ) and the gap between rich and poor countries by empirical evidence.