How did pre-industrial tribal societies – for example Inuits, manage to deal with inbreeding even though they were small in size and lacked outside contact?

Question

How did pre-industrial tribal societies – for example Inuits, manage to deal with inbreeding even though they were small in size and lacked outside contact?

In: Biology

Answer 1

There is a Brazilian tribe that create small villages of two big huts (hut #1 and hut #2) and each Hutt have a maximum capacity of 50 people. People of hut #1 can only marry people of hut #2 , and they move to the hut of the male family of the marriage. When the village 100 people or a Hutt get more than 50 people, they start another village with new two Hutt, and send only unmarried people there.