Specifically on the "unmarried adults who decide to live together do it for a much shorter duration than in Europe." quoted in the parent comment. I think ther

Specifically on the "unmarried adults who decide to live together do it for a much shorter duration than in Europe." quoted in the parent comment. I think there are cultural reasons why Americans are more likely to get married too, but don't discount the financial incentives since they are pretty substantial for new parents. Remember this is a country with no right to paid maternity leave! Take an example of an unmarried couple in San Francisco earning the median salary for the city of roughly $100,000/year each. As they both earn the same amount and get their health insurance through their respective employers so getting married has no immediate financial impact on them. They then decide to have a baby and one of them wants to take a year off to be with their young baby. They need health insurance but if they are unmarried and go on their partners health plan then that part of the health benefit is not tax deductible for their partner. If they get married they will pay maybe $12,000/year less in tax by filing jointly. ($7k federal tax, $3k state tax, $2k from deductible health benefits though maybe one partner would qualify for medicare.) So I think the financial considerations are a big part of why Americans choose to get married more than Europeans. As someone who moved here as an adult I find it so weird that it's talked about so much! Having children in a stable unmarried partnership is completely unremarkable for my friends and family in Europe.