In The WEIRDest People in the World Joseph Henrich argues that ending polygamous marriage helped strengthen people’s sense of community by allowing more men to father children and have a reason to invest in the future. His argument is that in polygamous societies the highest status men attract multiple wives, making it harder for lower status men to get married and have children. Without prospects for a wife or family, these men become more transient, are more willing to take risks, and are less committed to any single place or community. Only allowing one wife per high status man means that lower status men can get married, have children, and find a reason to invest in their communities.
This idea from Henrich supports an argument made by Matthew Desmond in his book Evicted. Not writing about marriage and family policy, but instead about housing policy, Desmond also argues that transient individuals with no future prospects harm the development of community. He writes, “neighbors who cooperate with and trust one another can make their streets safer and more prosperous. But that takes time. Efforts to establish local cohesion and community investment are thwarted in neighborhoods with high turnover rates. In this way, eviction can unravel the fabric of a community.”
Community requires long-term relationships, investments in people and places, and a commitment to the future. Henrich argues that giving men the opportunity to get married and build families provides these community pre-requisites. Desmond argues that the American system of evictions undermines these requirements. I think that looking at these two arguments together is interesting, and reinforces both.
Low-income tenants who face eviction, whether men or women, lack community and the benefits it provides. Their transient nature in places makes it hard for them to invest in relationships and doesn’t give them hope that the place they live can be better in the future. They underinvest in the places they live, hurting the community for themselves and others. Single men in polygamous societies are similar. They can’t find a wife and engage in the community in a complete way, and also disinvest from the community, harming community growth and safety for everyone.
What is important to recognize is that community requires people with a commitment to a place and reason to invest in growth and development. Individuals need to feel that they are in a place where they can achieve their desires and where they feel they can be socially accepted to connect with others. When people do, they can create real communities that help make life better for everyone. When they don’t they can create problems and havoc that holds communities back.