The biggest "move out from home" push in the USA was mid-1900s government cold war propaganda, to live as a trendy "Nuclear family" with just parents & their ki

The biggest "move out from home" push in the USA was mid-1900s government cold war propaganda, to live as a trendy "Nuclear family" with just parents & their kids. While this was anti-socialist material, given its greater focus on individualism, it was rumored to also be intended to break up powerful family clans, as well as prevent future rise of the same. Before these times, it was a lot more common for extended family to live together.