It’s not uncommon to hear men, particularly in conservative circles, speak favorably about having multiple wives. What’s discussed far less is what happens between the women expected to share a husband. Researchers examined nearly two centuries of historical accounts documenting conflict between women sharing a husband across 19 cultures and published it this year. They found that physical aggression was documented in 63% of them. In 74%, women competed for their husband’s sexual attention and affection, while only 37% documented competition over material resources. In 58%, wives even had separate living arrangements. Please take a look at the last table. Quite a detail to leave out when discussing polygamy.