Psychogenesis of humankind. The psychometrical and the cognitive-developmental approach in comparison

Populations of different societies are enormously differing in their average intelligence scores. Intelligence scores humans from developing countries lower than those developed countries. The intelligences populations industrialized have been continuously growing for more 100 years. These two groups phenomena interconnected to each other. While higher intellectual levels bound the rate cultural modernization, mental capacities pre-modern aren´t characterized and equipped by abstract ways thinking. This article intends make clear that psychometrical research results can be better understood putting them into context Piagetian Cross-Cultural Psychology. 1000 empirical enquiries, carried out past 70 years, show mind is within preoperational concrete-operational structures does not reach stage formal operations. Only adolescents modern chance develop this highest abstractive, deductive rational low indicate lack operations among populations. both outstanding theories psychology coming same conclusion referring problem relationship between culture cognition: Without influences human thinking remains simple archaic levels. Both theoretical approaches support confirm other, they mediate a proper understanding cognitive dimension social change modernization.