Racism and separation explain why people still don't look the same and why some disease still persists. I overused the word "recognizaby" in book three, but 2017 is too late for recognizably black or white.
There was a time when black people were known for pearly, white smiles. White people were known for soft teeth. This problem could have been solved long ago, like the Civil War ago. There's a reason why Philippino's look Spanish and share Latin culture. Horizontal and vertical integration were necessary for survival.
The America's host the least concentrations of human populations and still practice separatist racism. The excuse of rich versus poor ceased. It is time for America to close the last frontier for separation.