Part of my understanding of this is, that the definition of a race is social, rather than biological, is that the US/European definitions of race (white, black, yellow, etc.) are not universal across the human race. In some cultures and groups other physical characteristics, other than skin color, are the defining characteristics.

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At night the stars put on a show for free (Carole King)

One Earth, One Sky - IYA 2009
All moderation in purple