One conception of race is that it is skin deep, and is no more than a matter of skin pigmentation. By implication, such a categorisation is superficial, trivial, and unlikely to be an explanation of any presumed racial differences in behaviour. There may be effects due to people making unwarranted assumptions based on skin colour, but that says more about them than anything else.
According to the skin-pigmentation theory, an Xray should see right through that, to the reality of the bones underneath. This would reveal, the theory says, that people are alike under the skin. Perhaps so, but is it true of their bones?
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