As a Brit who lived in the US a few years so maybe has a detached perspective.. I saw Americans being happy in a land of opportunity with high personal freedom, opportunity to reinvent yourself, the great outdoors etc, and certainly I enjoyed that too. OTOH, individualism has its dark side. When people believe its all about self-determination and the state shouldn't be helping people, some people fall massively through the cracks e:g someone on low income while they try to look after a disabled family member. Americans are often generous at helping each other, in fact ironically I found those that supported economically right-wing "everyone should pull themselves up by their bootstraps" ideology, could often be simultaneously generous to others that they perceived to be in need. I think a source of unhappiness in the USA might be loneliness. To be honest, reading Laura Ingalls Wilder's "Little house on the prairie" series, while that sounds idyllic in a way, it also sounds lonely and hard work to me. So, some sources of lower happiness in the USA in terms of lack of community, might be deep-rooted? (some off the top of my head thoughts which others may dispute :). )