Ethiopian dating and marriage customs
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Though contemporaneous, the eugenics movement did not play much of a direct role in the bans.
The 19th-century academic debate on cousin marriage developed differently in Europe and America.
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.
Cousin marriage is an important topic in anthropology and alliance theory.
Children of first-cousin marriages may have an increased risk of genetic disorders, particularly if their parents both carry a harmful recessive mutation, but this can only be estimated empirically, and those estimates are likely to be specific to particular populations in specific environments.
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.Children of more distantly related cousins have less risk of genetic disorders.In fact, a study of Icelandic records indicated that marriages between third or fourth cousins (people with common great-great- or great-great-great-grandparents) may produce the most children and grandchildren. people with common grandparents or people who share other fairly recent ancestors).Opinions and practice vary widely across the world.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National Conference of Commissioners on Uniform State Laws unanimously recommended in 1970 that all such laws should be repealed, but no state has dropped its prohibition.