The "mono-marital principle" dictates that for each and every generation, one and only one marriage is permitted collectively among all the male siblings, and the children born out of this marriage are members of the family unit who have full legal rights.The family organization was based on these two patterns to avoid the partitioning of their estates.Bigenerational polygamy was present as an application of the mono-marital principle.Let us consider a family in which the mother died before the son was married.Professor Melvyn Goldstein believed this affected Tibet's traditional marriage system.With the change in social stratification the du-jung and the mi-bo lower classes were the first to avoid the forms of marriage that characterized the older society.Polygamous marriage, therefore arose as a solution to this potential threat.
Women take multiple husbands because they are strong and able to help tend their land.
However, as part of its population control measures, the Chinese government later forbade polyandrous marriage altogether under family law.
Even though it is currently illegal, after collective farming was phased out and the farmed land reverted in the form of long-term leases to individual families, polyandry in Tibet is de facto the norm in rural areas.
Concern over which children are fathered by which brother falls on the wife alone.
She may or may not say who the father is because she does not wish to create conflict in the family or is unsure who the biological father is.In traditional inheritance rules, only males had rights over the land, but where there were no males to inherit them, the daughters had the right over the corporation’s land.