The Human Development Index (HDI) is the normalized measure of life expectancy, literacy, education, standard of living,and GDP per capita for countries worldwide. It is a standard means of measuring well-being, especially child welfare. It is used to determine and indicate whether a country is a developed, developing, or underdeveloped country and also to measure the impact of economic policies on quality of life
The US is a first-world country, but 12th.

Iceland 0.968
Norway 0.968
Australia 0.962
Canada 0.961
Ireland 0.959
Sweden 0.956
Switzerland 0.955
Japan 0.953
Netherlands 0.953
France 0.952
Finland 0.952
United States 0.951

QUIZ: How many of the first 11 have Universal Health Care and other "socialist" traits?

By the way, "UK standard of living rises above that in America for the first time in a century."