Race, the Heritability of Iq, and the Intellectual Scale of Nature

As a scientific term, as opposed to a colloquial expression, “race” is precisely defined to be a reproductively isolated:, table, and genetically distinct subpopulation of a species. There is no “white” race anywhere on the globe. One could say there is a Caucasian racial stock, but this grouping includes the people of Iran, Afghanistan, and northern India who have various shades of brown skin. Neither is there a "black" race. Africa contains a number of different ethnic groups, some of which have Mongoloid ancestors. People with very dark skin can trace their ancestries to various parts of either Africa, Melanesia, India, or Australia. The idea of a "Mexican-American" racial group is very difficult to accept. The ancestors of the present-day population of Mexico include the Caucasians of Spain and the native people of Mongoloid extraction. There has been substantial reproductive intercourse between men and women of European, African, and Asian ancestries in the United States, which further blurs any ancient racial boundaries that may have existed.