
Well over 50,000 years ago we were all rather much the same, but by spreading out across various climates we developed different biological traits because of climates that we adapted to.
One was the loss of skin pigmentation of differing degrees, and various scenarios could have taken place, but they all stretched out over an extremely long timeline, one that we or our grandchildren will not see the end of.
More than likely, individual races or the correct term ‘ethnicities’ continue to exist. There has been some homogenisation between other cultures, such as mixed-race individuals today.
There would still be separate groups even though the divisions would become blurred if this were extended out over a long enough period of time.

If we keep going long enough – I’m talking over thousands of years, we might get to a point where we are all so ethnically integrated that we all resemble the same common race, although I would like to believe that there would still be some individual pockets of individual culture.
Race as we come to view it is a social and cultural construct, not a biological one. I don’t like the word ‘race’ because, at the end of the day, we are all Homo-Sapiens.
And let’s face it, in the long run, we are all under the threat of extinction because one day this world will cease to exist.
Preserving a certain shade of skin tone is a thing. I’m white by most people’s definition, but frankly, who cares? People migrate, languages alter and cultures blend. It’s called the human species, for better or for worse, and life continues, but at some point, we will all die out due to environmental, biological or galactic events.

Nobody cares if chimps are auburn, brown or ashy sienna. Jesus was a blonde cherub, but he wasn’t – born in Bethlehem he would have been a nice golden brown!
Even if white people were to vanish, who cares? Cultures and social groups evolve and the disappearance of the skin tone that we call ‘white’ would be a reflection of that transformation. Skin tone doesn’t mean anything beyond the arbitrary racial classifications we assign to them.
However, white British people are being replaced by immigration or by the biological evolution of the minority people. Over time, the result of this process will be a wave of White British decline.

By 2150, three-quarters of Britain’s population will be mixed-race.