Moreover, many of these differences are essential to the survival and progress of the human race. People have different vulnerabilities and resistances to a variety of diseases. That is why one disease is unlikely to wipe out the human species, even in one place. An epidemic that sweeps through an area may leave some people dying like flies while others remain as healthy as horses. There are children who are years late in beginning to talk and yet who end up scoring over the 90th percentile on math tests.
Individuals differ radically from one another in all sorts of skills, interests and talents.
What all this means is that the capabilities of the human race vastly exceed the capabilities of even the brightest and the best individuals. When the brightest and the best take over making decisions for other people, usually through the power of government, those decisions are likely to be based on less knowledge, experience and understanding than when ordinary people make their own individual decisions for themselves. The anointed may know more than the average person, but far less than all the ordinary people put together. Scientists who study the brain say that some abilities develop greatly at the expense of other abilities. Socially as well, some talents are developed by neglecting others.