I'd say the bottom 50% live much more prosperously in Denmark than in the US.
BTW I was curious and looked at list of US states by human development index. There's no obvious correlation between size of a state and its ranking. https://en.wikipedia.org/wiki/List_of_U.S._states_by_America...
[1]: https://en.wikipedia.org/wiki/Where-to-be-born_Index [2]: https://en.wikipedia.org/wiki/Human_Development_Index