The Nordics, where having kids also increases your happiness, are also very high on individualism as opposed to collectivism. The key difference to the US are t

The Nordics, where having kids also increases your happiness, are also very high on individualism as opposed to collectivism. The key difference to the US are the public policies that allow families never to stress about things like arranging daycare to the kids from the day they born. These policies are not there to combat individualism, but to enable it with taxpaid support networks. Most of them are not poor aids, but state benefits that everyone enjoys, like the free or cheap high quality daycare used by the poor and rich alike.