Because of higher solar radiation intensities in certain parts of the world.
Why does white skin exist?
Because that solar radiation intensity isn't uniform across the planet and bodies have an 'Energy Budget' for existing that's a balance between survival and reproductive ability. Skew too much in one direction and you screw both facets. Ignoring the human condition the entire point of Life is to reproduce. Sometimes this happens indirectly with kin selection but the basic premise is still there.
What does space travel mean?
Living in artificial structures designed to prevent stellar radiation from killing the inhabitants.
What will that include?
Solar radiations that causes melanin production.
Therefore; spaceborne human civilisations move towards decreased melanin expression because of evolutionary biology as it's no longer needed and in biology waste can mean death and death means no reproduction so plants and animals don't waste energy on things it never needs.
This is why tanning happens in people because the body realizes it needs to produce more melanin to survive better. Persist in such an environment tanning will happen and the tan will also persist. Go back to wherever someone came from and there is no more need to the tan fades.
tl;dr Humanity ever lasts long enough to establish itself in space there will be a paradigm shift away from dark skin without artificial manipulation, this includes using a planetary breeding stock to maintain a population gene pool and is probably just stupid and woke enough to be suggested by wokesters if this topic ever gets properly addressed.
See also: There's a reason Superman is white because Kryptonians lore wise are an ancient race. Plus solar absorption for powers works better when there isn't a layer in the skin blocking said solar radiation. Calvin Ellis and Val-Zod and every other black Kryptonian should never, ever be as potentially strong as any white Kryptonian because of this.
That's an actual vague fear of mine, that humanity will be represented in the future and across space by Chinese culture. Aliens would be justified in trying to eradicate us.
When everyone is black, no one will be.
That's the 22nd century demographic predictions, yes.
Never leaving Earth in that case then.
Because of higher solar radiation intensities in certain parts of the world.
Because that solar radiation intensity isn't uniform across the planet and bodies have an 'Energy Budget' for existing that's a balance between survival and reproductive ability. Skew too much in one direction and you screw both facets. Ignoring the human condition the entire point of Life is to reproduce. Sometimes this happens indirectly with kin selection but the basic premise is still there.
Living in artificial structures designed to prevent stellar radiation from killing the inhabitants.
Solar radiations that causes melanin production.
Therefore; spaceborne human civilisations move towards decreased melanin expression because of evolutionary biology as it's no longer needed and in biology waste can mean death and death means no reproduction so plants and animals don't waste energy on things it never needs. This is why tanning happens in people because the body realizes it needs to produce more melanin to survive better. Persist in such an environment tanning will happen and the tan will also persist. Go back to wherever someone came from and there is no more need to the tan fades.
tl;dr Humanity ever lasts long enough to establish itself in space there will be a paradigm shift away from dark skin without artificial manipulation, this includes using a planetary breeding stock to maintain a population gene pool and is probably just stupid and woke enough to be suggested by wokesters if this topic ever gets properly addressed.
See also: There's a reason Superman is white because Kryptonians lore wise are an ancient race. Plus solar absorption for powers works better when there isn't a layer in the skin blocking said solar radiation. Calvin Ellis and Val-Zod and every other black Kryptonian should never, ever be as potentially strong as any white Kryptonian because of this.
Maybe the Chinx will.
That's an actual vague fear of mine, that humanity will be represented in the future and across space by Chinese culture. Aliens would be justified in trying to eradicate us.
(globally)