For centuries people thought that physique was the defining factor of racial identity. For many
of those centuries, they also thought the world was flat.
Unfortunately, there are people who still hold firmly to the belief that physique, more commonly known as race,
is the biological division of humans. How they arrived at that conclusion, I haven’t obtained sufficient
information/data from anyone to make a distinction.
There is no biological division of humans. Humans are Homo sapiens or Homo sapiens sapiens.
This was proven by Charles Darwin and other anthropologists. All of which has been scientifically
confirmed. Yet, there are still people that deny the findings as inaccurate.
What there has evolved is a societal phyla of humans. Structured to meet any standards that people considered of another’s physique/race which was consistent with their beliefs, their societal structure (tribal groupings) or their religion. From Aboriginals to Zulu’s, the societal phyla has divided again and again until there are so many that the universitas is unlimited. It has diverged from large groups into smaller groups within the larger groupings. Smaller groupings have also stayed static amid dense jungles or remote areas of earth with the occasional lone survivor of some catastrophic event.
This ability to evolve a structured phyla is enhanced by people choosing to reside among their like physique humans.A choosing that can diminish the accessibility of interaction with those of a different physique and/or has lead to the grouping being constrained by a larger grouping of a different physique. It also can lead to a larger group having an intial feeling of superiority.
What many overlook is the simple fact that the human body adjusts to the environment, evolution and adaptibility. These are the two main keys to how humans have survived and evolved.
Hopefully, one day humans will evolve past the structured phyla also.
On Wikipedia, the section Human Skin Color has a list of over 100 source information. http://en.wikipedia.org/wiki/Human_skin_color