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Scientists remind us once again that at one time in our history we were all members of the same race and, in time, we will be again so we should all try harder to help and respect each other regardless of the race we identify with today. Recently there has been new publicity of the original DNA studies scientists used to map the migratory routes members of the original race of modern humans took out of Africa 60,000 years ago.
These migrations were driven by need, opportunity and curiosity. During these migrations modern humans encountered many new increasingly difficult obstacles and threats from predators and other species of hostile humans who had migrated earlier, along with changing environmental conditions. Overcoming these difficulties favored those individuals with the highest intelligence, stamina and survival skills who also had acquired some different biological and physical traits better suited for the new conditions.
As distances from home increased, so did environmental differences, making biological and physical traits more important than having the highest level of intelligence and survival skills. During the journey, individuals with lesser abilities either died, stayed where they were, or returned home to resume doing things in the ways they were familiar with. Over a long period of time, individuals with the highest abilities, equipped with some very important new biological and physical traits, continued to explore, develop new ways of doing things, and expand their growing populations into areas far removed from other groups, which greatly limited the size of each group’s gene pool. In time, most members of each isolated group acquired these new traits by natural selection, and because they were the only ones available to be inherited. A race was born! Of course, each race’s new traits, being different from the traits exhibited by members of other racial groups, were a source of group pride and strong group loyalty that were sometimes exploited by each race’s leaders to instill fear and hatred of any individual or group with different ones.
Settled Science discusses some of these racial differences and how natural selection chose them.
Source: www.IBM.com/special
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