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Cities eventually dotted the coast to support local economies and serve as trade hubs.English colonists were supplemented by waves of Scotch-Irish and other groups.As coastal land grew more expensive, freed indentured servants pushed further west.During the Seven Years' War (in America, known as the French and Indian War), British forces seized Canada from the French, but the francophone population remained politically isolated from the southern colonies.The current constitution was adopted in 1788, with the first ten amendments, collectively named the Bill of Rights, being ratified in 1791 to guarantee many fundamental civil liberties.The United States embarked on a vigorous expansion across North America throughout the 19th century, acquiring new territories, as a global superpower, the first country to develop nuclear weapons, the only country to use them in warfare, and a permanent member of the United Nations Security Council.The United States is a founding member of the United Nations, World Bank, International Monetary Fund, Organization of American States (OAS), and other international organizations. The singular form—e.g., "the United States is"—became popular after the end of the American Civil War. In English, the word "American" rarely refers to topics or subjects not connected with the United States.The United States is a highly developed country, with the world's largest economy by nominal GDP and second-largest economy by PPP, accounting for approximately a quarter of global GDP. Joseph Reed, Moylan expressed his wish to carry the "full and ample powers of the United States of America" to Spain to assist in the revolutionary war effort. The singular form is now standard; the plural form is retained in the idiom "these United States". S." refer to the country adjectivally ("American values", "U. Over time, indigenous cultures in North America grew increasingly complex, and some, such as the pre-Columbian Mississippian culture in the southeast, developed advanced agriculture, grand architecture, and state-level societies.
There may also have been confusion with Nuu-chah-nulth, the natives' autonym (name for themselves).During the Cold War, the United States and the Soviet Union competed in the Space Race, culminating with the 1969 moon landing. "Columbia", a name popular in poetry and songs of the late 18th century, derives its origin from Christopher Columbus; it appears in the name "District of Columbia".