I was going to Reply to Bowser's method of homogenizing the human race but I think the subject might deserve it's own thread.

There is so much to think about the effects of a conversion to a one-color planet. Like how history would change if race was never an issue. Or the loss of the "diversity" that we are supposed to celebrate in this country.

From Wikipedia:

"From ~1.2 million years ago to less than 100,000 years ago, the ancestors of all people alive were dark-skinned Africans.

As populations began to migrate, the evolutionary constraint keeping skin dark decreased proportionally to the distance North a population migrated, resulting in a range of skin tones within northern populations.

At some point, northern populations experienced positive selection for lighter skin due to the increased production of vitamin D from sunlight and the genes for darker skin disappeared from these populations."