The “marry your cousin” meme reduces IQ to 72, almost 2 st devs down, casting believers into mental weakness from which escape is hard.
Replying to @JamesPsychol
.@JamesPsychol a study from the '70s of israeli arabs: Effects of inbreeding on cognitive performance http://www.nature.com/nature/journal/v266/n5601/abs/266440a0.html … found... (1/2)
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