Your Daily Awesome

I swear to god I wasn’t spending my night googling “inbreeding + enfeeblement” earlier this week, but that didn’t stop me from running across this fascinating article on the topic.

In our lore, cousin marriages are unnatural, the province of hillbillies and swamp rats, not Rothschilds and Darwins. In the United States they are deemed such a threat to mental health that 31 states have outlawed first-cousin marriages. This phobia is distinctly American, a heritage of early evolutionists with misguided notions about the upward march of human societies. Their fear was that cousin marriages would cause us to breed our way back to frontier savagery—or worse. “You can’t marry your first cousin,” a character declares in the 1982 play Brighton Beach Memoirs. “You get babies with nine heads.”
So when a team of scientists led by Robin L. Bennett, a genetic counselor at the University of Washington and the president of the National Society of Genetic Counselors, announced that cousin marriages are not significantly riskier than any other marriage, it made the front page of The New York Times. The study, published in the Journal of Genetic Counseling last year, determined that children of first cousins face about a 2 to 3 percent higher risk of birth defects than the population at large. To put it another way, first-cousin marriages entail roughly the same increased risk of abnormality that a woman undertakes when she gives birth at 41 rather than at 30. Banning cousin marriages makes about as much sense, critics argue, as trying to ban childbearing by older women.