the race thing has been debated repeatedly
in a small society, it is unlikely that there would be racial diversity, becaue the gene pool is limited
even if it were to start off diverse, it would become muddled after only a few generations and then there would be no diversity, again
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Why is it that if someone tells you that there are 1 billion stars in the universe you will believe them,
but if they tell you a wall has wet paint you will have to touch it to be sure?