Caring For The Earth And Its People
An Idea Whose Time Has Passed
What makes "race."
Tribes of every kind, religious, national, political search for a reason for superiority. Why it is, to one degree or another in our nature.
In America, there is a further tragic reason why a black person may seem different than a white person. Almost entirely blacks were brought to America as slaves.
It may seem like a long time ago, but the left over views of ancestors being slaves, althugh it meaans nothing genetically, is a barrier that passes on.
Any shade that is not pure "white" can arrouse in some an immediate condemnation without any other reasson and without any hint of why skin color might be less than pure white.
The answer begins with geography, for we are all Africans, thorought docuented by archeology and genetics and all our ancestors were brown and all descended from a few tribes that migrated north from Africa some 50-100 thousands years ago. By far the strongest determination of color is simply sunlight, as basic a cause as one could imagine. Evolution endowned us with a need for certain nutrients one of which was vitamin D which is created by our skins by sunlight. Less sunlight, less vitamin D. Too little vitamin D and death. So evolution took it upon itself to accommodate the sun and remove a protective part of our chemical makeup whne there was little sunlight. Presto, back to sufficient vitamin D, and likely some views of fjorids.
Less melanin equals more white. Simple. But not the end of the story.
Dark skined people were brought to America by the millions as slaves. They lived impossibly difficult lives and those difficulties continue to affect recent generations.
It is of course true, not only for people of color, that the society you are born into, educationed or not, poor or wealthy, treated humanely or not will travel from generation to generation, unless luck intervenes.
When humans first ventured out of Africa some 60,000 years ago, they left genetic footprints still visible today. By mapping the appearance and frequency of genetic markers in modern peoples, we create a picture of when and where ancient humans moved around the world. These great migrations eventually led the descendants of a small group of Africans to occupy even the farthest reaches of the Earth.
Our species is an African one: Africa is where we first evolved, and where we have spent the majority of our time on Earth. The earliest fossils of recognizably modern Homo sapiens appear in the fossil record at Omo Kibish in Ethiopia, around 200,000 years ago. Although earlier fossils may be found over the coming years, this is our best understanding of when and approximately where we originated.
According to the genetic and paleontological record, we only started to leave Africa between 60,000 and 70,000 years ago. What set this in motion is uncertain, but we think it has something to do with major climatic shifts that were happening around that time—a sudden cooling in the Earth’s climate driven by the onset of one of the worst parts of the last Ice Age. This cold snap would have made life difficult for our African ancestors, and the genetic evidence points to a sharp reduction in population size around this time. In fact, the human population likely dropped to fewer than 10,000. We were holding on by a thread. Learn more about Migratory Crossings
Once the climate started to improve, after 70,000 years ago, we came back from this near-extinction event. The population expanded, and some intrepid explorers ventured beyond Africa. The earliest people to colonize the Eurasian landmass likely did so across the Bab-al-Mandab Strait separating present-day Yemen from Djibouti. These early beachcombers expanded rapidly along the coast to India, and reached Southeast Asia and Australia by 50,000 years ago. The first great foray of our species beyond Africa had led us all the way across the globe.
Slightly later, a little after 50,000 years ago, a second group appears to have set out on an inland trek, leaving behind the certainties of life in the tropics to head out into the Middle East and southern Central Asia. From these base camps, they were poised to colonize the northern latitudes of Asia, Europe, and beyond. Learn more about Migration Mysteries V Around 20,000 years ago a small group of these Asian hunters headed into the face of the storm, entering the East Asian Arctic during the Last Glacial Maximum. At this time the great ice sheets covering the far north had literally sucked up much of the Earth’s moisture in their vast expanses of white wasteland, dropping sea levels by more than 300 feet. This exposed a land bridge that connected the Old World to the New, joining Asia to the Americas. In crossing it, the hunters had made the final great leap of the human journey. By 15,000 years ago they had penetrated the land south of the ice, and within 1,000 years they had made it all the way to the tip of South America. Some may have even made the journey by sea. Learn more about the Bridge to the New World
The story doesn’t end there, of course. The rise of agriculture around 10,000 years ago—and the population explosion it created—has left a dramatic impact on the human gene pool. The rise of empires, the astounding oceangoing voyages of the Polynesians, even the extraordinary increase in global migration over the past 500 years could all leave traces in our DNA. There are many human journey questions waiting to be asked and answered. What stories are waiting to be told in your own DNA? Learn more about The Development of Agriculture