According to the Economist Intelligence Unit, relying on scores from 11 variables, not the United States, though we are better off than the people born in Russia:
If you came into the world today and could pick your nationality, there are at least 15 better choices than to be born American, according to a study by the Economist Intelligence Unit. The firm looked at 80 countries, scoring them across 11 variables to determine “which country will provide the best opportunities for a healthy, safe and prosperous life in the years ahead.” The results, mapped out above, are both surprising and not.
The best countries to be born in are small, peaceful, homogenous, liberal democracies.