Dating a cousin by marriage
people with common grandparents or people who share other fairly recent ancestors).Opinions and practice vary widely across the world.
It began to fall out of favor in the 19th century as women became socially mobile.The writings of Scottish deputy commissioner for lunacy Arthur Mitchell claiming that cousin marriage had injurious effects on offspring were largely contradicted by researchers such as Alan Huth and George Darwin.In fact, Mitchell's own data did not support his hypotheses and he later speculated that the dangers of consanguinity might be partly overcome by proper living.Though contemporaneous, the eugenics movement did not play much of a direct role in the bans.George Louis Arner in 1908 considered the ban a clumsy and ineffective method of eugenics, which he thought would eventually be replaced by more refined techniques. Since that time, Kentucky (1943) and Texas have banned first-cousin marriage and since 1985, Maine has mandated genetic counseling for marrying cousins to minimise risk to any of serious health defect to their children.Such marriages carried no social stigma in the late Republic and early Empire.
They cite the example of Cicero attacking Mark Antony not on the grounds of cousin marriage, but instead on grounds of Antony's divorce.
In some cultures and communities, cousin marriage is considered ideal and actively encouraged; in others, it is subject to social stigma.
Cousin marriage is common in the Middle East, for instance, where it accounts for over half of all marriages in some countries.
Later studies by George Darwin found results that resemble those estimated today.
His father, Charles Darwin, who did marry his first cousin, had initially speculated that cousin marriage might pose serious risks, but perhaps in response to his son's work, these thoughts were omitted from a later version of the book they published.
The National Conference of Commissioners on Uniform State Laws unanimously recommended in 1970 that all such laws should be repealed, but no state has dropped its prohibition.