Had the younger dryas period not occured, every human on Earth would still have high melanin levels as a core characteristic of their DNA composition, i.e. every human on Earth would have dark eyes and dark skin. Light pigments of skin and colored eyes can be traced back to originate 12,000 years ago, specifically in the region of the Baltic Sea, following a cataclysmic event (the cause is still being debated) that struck Antartica, the Americas, as well as much of Europe and Asia. The event caused dramatic drops in tempature, hence the reason Antartica is covered in ice today and the overwhelming evidence that it was once a lush and hot forest region. This is why these continents lack large animals, whereas places like Australia and Africa remained untouched by the event therefore remain habitats to the last remaining megafauna (large animals) on Earth. The human populations in affected areas were forced underground 12,000 years ago, where a lack of exposure to sunlight and quality food sources caused, what science likes to call "genetic mutations" (I prefer the term environmental adaptation) over the course of 3,000 years.
There is nothing more ignorant than racism and indifference, because there is no black. There is no white. There is no in between. There's just human physiology and the way in which it adapts to its environment. #arlucas