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Hypothetically speaking, if average human population group differences in aptitude, temperament, personality and decision-making exist and are immutable over generational timespans, and those group average differences are greater when the population groups being compared are larger (i.e. ethnicity versus race), would anything change about principal economic theories and concepts (e.g. free trade, externalities, free movement of labor, comparative advantage, public choice theory, opportunity cost, rationality of players, labor force growth)? If so, how would they change?