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Extreme Real-Life Consanguinity Proscriptions, and theoretical discussion following therefrom
Posted: Posted July 4th
Edited Thursday by chiarizio
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This post won’t contain a specific question; just a request for comments.

https://en.m.wikipedia.org/wiki/Consanguinity#Christianity
Among the Christian ''Habesha'' highlanders of [[Ethiopia]] and [[Eritrea]] (the predominantly orthodox Christian [[Amhara people|Amhara]] and [[Tigray-Tigrinya people|Tigray-Tigrinya]]), it is a tradition to be able to recount one's paternal ancestors at least seven generations away starting from early childhood, because "those with a common patrilineal ancestor less than seven generations away are considered 'brother and sister' and may not marry." The rule is less strict on the mother's side, where the limit is about four generations back, but still determined patrilinearly. This rule does not apply to Muslims or other ethnic groups.<ref>Wolbert Smidt, "Genealogy" in Siegbert Uhlig, ed., ''[[Encyclopaedia Aethiopica]]: D-Ha'', (Wiesbaden: Harrassowitz Verlag, 2005), p. 743.</ref>


https://en.m.wikipedia.org/wiki/Consanguinity#Hinduism
In the [[Manusmriti]] blood relation marriage(in mother's side) is prohibited for 7 generations.

[[Ayurveda]] states that marriage within the [[Gotra]](Father's side) is a consanguineous marriage which can lead to many gestational and genetic problems in the fetus. So it has become a common practice in the Hindu households during pre-marriage discussions to ask the couples' Gotra. Couples of the same Gotra are advised not to marry. The advisers of this system say that this practice definitely helps in reducing the gestational problems and ensures a healthy progeny.{{citation needed|date=November 2018}}


If we consider the family tree of an individual including that individual and all their ancestors going back for seven or fewer generations, it includes possibly 255 people (if no individual occupies two or more positions in it).

It seems impractically burdensome to expect a prospective bride (W) and groom (H) to keep track of all 255 individuals’ names or identities in their own tree, and compare them with the names or identities in their prospective spouse’s tree, to make sure nobody occurs in both trees.



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OK. I’m done with this post.

Any comments?



There are 6 Replies

Any comments?


Just a question. Why do I have an alert for this post?

Posted July 4th by Cruinn-Annuin
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I know the aboriginal people in australia had a system of naming that was meant to prevent marriage to close relatives. Like there were only a total of 8 groups of names and certain names could only marry certain other names, and the names of their children are already chosen.
https://en.wikipedia.org/wiki/Australian_Aboriginal_kinship
you reminded me of this. thats my comment.

Posted July 4th by yukta
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yukta
 

@yukta:
I know the aboriginal people in australia had a system of naming that was meant to prevent marriage to close relatives. Like there were only a total of 8 groups of names and certain names could only marry certain other names, and the names of their children are already chosen.

https://en.wikipedia.org/wiki/Australian_Aboriginal_kinship

you reminded me of this. thats my comment.

Thank you!
I’d heard of them, and used some of those ideas in some of my concultures; but I’d never seen that Wikipedia article, and most of that information in that article was news to me!
I’m glad I’ve read it now! I’ll probably read it more carefully soon!


Posted July 4th by chiarizio
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Incidentally, according to
https://en.m.wikipedia.org/wiki/Consanguinity#Genetic_definitions
Since comparatively few people can trace their full family tree for more than four generations, the identity of fourth-degree cousins often cannot be established. Also, at a genetic level, half-fourth cousins typically do not exhibit greater genetic similarity with one another than with any other individual from the same population.[19]

“H and W are half-fourth-cousins” means, that an ancestor of H four generations ago (a grandparent’s grandparent) and an ancestor of W four generations ago (a greatgreatgrandparent) were half-siblings; they shared one parent. So, H and W shared an ancestor five generations back from each of them.
Wikipedia is saying that implies no greater genetic similarity than belonging to the same landrace.


Edited July 5th by chiarizio
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@chiarizio

May I ask what your interest is in the topic? You seem to be quite well-read about it.

Are you designing a social system for populating Mars



Posted July 5th by yukta
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yukta
 

@chiarizio: May I ask what your interest is in the topic? You seem to be quite well-read about it. Are you designing a social system for populating Mars


I’ve been working on questions like this since 9th grade Algebra class.
So I have a much easier time saying how long I’ve been interested, than remembering why I ever got interested in the first place.

I’ve been stumbling across articles and terms and so on relevant-ish to this kind of thing, ever since graduate school (MS Math, U of Houston) and early in my second marriage.

I’m not so much “well”-read, as “cast a wide net”-read.

So anything else you think I’d be interested in, please tell me!

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I am, in fact, doing things like this for two of my built-worlds; Adpihi/Reptigan, and Ataivsh.
Adpihi/Reptigan goes through four systems; Early Adpihi, Late Adpihi, Early Reptigan, and Late Reptigan.
They all have systems reminiscent of the Australian systems in Wikipedia.

Ataivsh has four sophont “races”, of which three are hominoid. All three of the hominoid species (“races”) have systems sorta like these.



Posted July 5th by chiarizio
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