A Potlach is a ceremonial feast, common with the Northwest Native American tribes, wherein possessions were given away or destroyed by the wealthy tribespeople in a show of their opulence and wealth.
Russia already divided
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The women who are more likely to remarry are young mothers and those with no high school.
Young mothers often feel intimidated by having to take care of their children on their own, which is why they often unconsciously seek help from their partners, and start relying on them so much that it is easier for them to just get married again. The same thing goes for those with no high school - often they will want to marry someone who will take care of them.