Does Kinship have a necessary biological component?

>>2551639
https://en.wikipedia.org/wiki/Zadruga

This was the last surviving "kinship" model, and it was formed on the idea of your extended family, including distant relatives and those who married into your extended family.

So I'd say either "shared genes", or "shared genetic investment", as is the case of marrying into a kinship.
Probably the second, as there was an emphasis of only men who have children partaking in decision making.

>>2551639

Kinship only happens when parties are dealing with common threats and have vested interest in perpetuating kinship.

I'd say less "genes" than expressed phenotypes. People who like being around other people are going to have a kinship with natives, if they play along on the same level as them.

Of course, an area can filter a particular type of friendliness towards either xenophobia or towards homogenization. Warring tribes with alliances or monopoly of the single tribe in an area.

Necessary? No. But have we evolved to the point where shared blood and shared genes are extremely important to our conceptions of kinship? Yes. Is that a good thing? Yes.

>>2551682
Can you go further into why you think it's a good thing? Not disagreeing, just curious as to what you 're thinking.

>>2551727
The point of a biological being is to ensure not specifically it's propagation, but the propagation of genes. Propagating itself is a good way to do this but as a social animal helping those who share "blood" propagate successfully can be even better and lead to even better gene success.
This is why men are willing to sacrifice themselves in battle for their people, and why people generally prefer those closer to them in appearance.
Basically it leads to more successful populations. Without this vicarious genetic success people would not be able to be self sacrificial, which forms much of the basis of civilisation.

>>2552186
You're assuming a lot about the men who sacrifice themselves in battle.

>>2552186
Self-sacrifice can be compelled by ideology too, such as religion. Admittedly it's much more difficult than with kinship.