Less than 0.5% of Americans are married to first cousins (old-ish data); not especially rare around the world though http://fivethirtyeight.com/features/how-many-americans-are-married-to-their-cousins/?ex_cid=538twitter …pic.twitter.com/jEw6tBNosz
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it's horrifying. Consanguinity has obvious genetic consequences, bizarre to continue promoting/accepting it
.@mrbones_returns r.c. church promoted outmarriage in w medieval europe but seems to've been a roman invention... @alicemazzy @BookOfTamara
.@mrbones_returns ...passed down via church (like so many things): https://hbdchick.wordpress.com/2015/01/12/what-did-the-romans-ever-do-for-us/ … @alicemazzy @BookOfTamara
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