The concept of racial purity is associated the belief that the various so-called races of mankind should be kept "pure" by not permitting interbreeding.

This belief is associated with racism and attempted biological justifications for this concept are now regarded as pseudoscientific.

Miscegenation is a term for people of different human races producing offspring; it should be noted that the use of this term is almost invariably restricted to those who believe such "race mixing" is inherently bad.

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