@endurancefun: I missed the memo where interracial relationships were required by the government? And that they're still a very small percentage of relationships?
also your opinion is terrible and stuff but you already knew that (which is why you put that thing on at the end).
I'm just logically finding what end results from this action, don't mind me, just using me noggin.
Except that you're arguing from a completely counterfactual premise. Mating across the entire population of a species increases genetic diversity, not the other way around. Two parents with greatly heterogeneous genomes will give birth to an offspring of even greater genetic diversity compared to the overall population. Two homogeneous parents will risk compounding harmful mutations. This is why inbreeding is a bad thing, and why siblings and cousins having children is especially bad because it increases the risk that any familial recessive traits are carried over from both parents, resulting in a genetic disease.
And no, a lot of isolated populations spread across the globe of great heterogeneity between the groups will still not protect as much against a disease as a large population of greatly heterogeneous individuals. In a worst case scenario f an extremely lethal disease this might mean that one of the smaller groups has a larger population carrying a beneficial mutation resulting in more survivors in that group initially compared to the large group, but it also lowers the chance of any group having the mutation in the first place - the more genetic mixing, the greater the chance of a protective trait being either carried over or created
Sure, interbreeding will lead to a higher degree of cosmetic homogeneity because a lot of those traits are recessive or mosaic. But it's just that - cosmetic. The underlying genetics will be more heterogeneous. The real way of lowering genetic diversity is by having one small group significantly outbreed the other groups and over generations achieve considerable numerical superiority and then have it outcompete the remaining groups.
Interracial relationships are the complete opposite of that.
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