I saw a scientific study on the history channel or maybe discovery channel, done on rats.
There were white colored rats and black colored rats, and it begins with a brood of white rats, that grew up with only white rats around them, even from other families.
A foreign white rat was introduced in to the area with them.
They accepted this white rat, in to their community, like she or he was Their sister or brother.
Then the next experiment, they introduced a new black rat to their community, and these rats shunned it, and were darn right mean and wicked towards this black colored rat.
Then they repeated this experiment with a brood of black rats, never knowing any white rats when young and growing up,
And they did the exact same things When a rat of a different color, and a rat of the same color, were introduced as the previous white group of rats. They were mean as heck towards the rat of a different color, then how they were raised.
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The last group of experiments were with groups of white rats, that were raise from babies in their community with another black rat family.
The white rats were put in this experiment area, and a new foreign white rat, they accepted him or her.
Then this time, when the new foreign black rat was introduced to the white brood, they ACCEPTED him as well...
Repeated experiment with black rat brood, and they too, this time... accepted the white rat.
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The hypothesis is that if we had diversity, from the get go.... birth through adulthood....then we wouldn't continue to only hang with or accept, only people of our own color.... we could literally become color blind...impervious to another human's color.