"I should make clear, however, that my overall assessment of AJR’s and CCP’s work is an admiring assessment and not a negative one. When one deals with big, complicated, multidetermined subjects such as economic history, it is unlikely that first scholarly treatments will discover the whole answer and identify all determining factors. Instead, one usually has to begin by identifying a few major factors, investigate whether those postulated factors are correct, and then see what still remains unexplained, before one can hope to identify further factors. AJR succeeded convincingly in formulating a problem and in demonstrating the explanatory roles of some factors. CCP have now extended AJR’s work by identifying further factors. That still does not give us a complete understanding of economic history. It remains a challenging problem, requiring much more research, for social scientists to disentangle the contributions of each of the elements of cultural and biological baggage to national wealth."
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