Paleo-Indians migrated from Siberia to the North American mainland at least 12,000 years ago. European colonization began in the 16th century.
It is a founding member of the United Nations, World Bank, International Monetary Fund, Organization of American States , NATO, and other international organizations.
Despite income and wealth disparities, the United States continues to rank very high in measures of socioeconomic performance, including average wage, median income, median wealth, human development, per capita GDP, and worker productivity.
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