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Evolution shows that in the long run, if the superior mixes with the inferior, the product is halfway between, and inferior to what you started with in the original superior group - in other words, mongrelized.

Interview with Alex Haley, Playboy, April 1966.
Evolution shows that in the long run, if the superior mixes with the inferior, the product is halfway between, and inferior to what you started with in the original superior group - in other words, mongrelized.