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Americas

Landmass comprising North and South America

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Along with their associated islands, the Americas cover 8% of Earth's total surface area and 28.4% of its land area. The topography is dominated by the American Cordillera, a long chain of mountains that runs the length of the west coast. The flatter eastern side of the Americas is dominated by large river basins, such as the Amazon, St. Lawrence River–Great Lakes, Mississippi, and La Plata basins. Since the Americas extend 14,000 km (8,700 mi) from north to south, the climate and ecology vary widely, from the arctic tundra of Northern Canada, Greenland, and Alaska, to the tropical rainforests in Central America and South America.

Humans first settled the Americas from Asia between 20,000 and 16,000 years ago. A second migration of Na-Dene speakers followed later from Asia. The subsequent migration of the Inuit into the neoarctic c. 3500 BCE completed what is generally regarded as the settlement by the Indigenous peoples of the Americas. The Norse colonization of North America saw several settlements established in Greenland, and perhaps on the mainland, however, these were later abandoned. The Spanish voyages of Christopher Columbus from 1492 to 1504 resulted in permanent contact with European (and subsequently, other Old World) powers, which eventually led to the Columbian exchange and inaugurated a period of exploration, conquest, and colonization whose effects and consequences persist to the present.

The Spanish presence involved the enslavement of large numbers of the indigenous population of the Americas. Diseases introduced from Europe and West Africa devastated the indigenous peoples, and the European powers colonized the Americas. Mass emigration from Europe, including large numbers of indentured servants, and importation of African slaves largely replaced the indigenous peoples in much of the Americas. Decolonization of the Americas began with the American Revolution in the 1770s and largely ended with the Spanish–American War in the late 1890s. Currently, almost all of the population of the Americas resides in independent countries; however, the legacy of the colonization and settlement by Europeans is that the Americas share many common cultural traits, most notably Christianity and the use of West European languages: primarily Spanish, English, Portuguese, French, and, to a lesser extent, Dutch.

The Americas are home to more than a billion inhabitants, two-thirds of whom reside in the United States, Brazil, and Mexico. It is home to eight megacities (metropolitan areas with 10 million inhabitants or more): Greater Mexico City (21.2 million), São Paulo (21.2 million), New York City (19.7 million), Los Angeles (18.8 million), Buenos Aires (15.6 million), Rio de Janeiro (13.0 million), Bogotá (10.4 million), and Lima (10.1 million).

Etymology and naming

The name "America" was first recorded in 1507. A world map created by Martin Waldseemüller was the earliest recorded use of the term. The name was also used (together with the related term Amerigen) in the Cosmographiae Introductio, apparently written by Matthias Ringmann, in reference to South America. It was applied to both North and South America by Gerardus Mercator in 1538.

It is generally accepted that he derived the "America" nomenclature from the name of Amerigo Vespucci, an Italian explorer, who explored the two continents. However, Bristol antiquarian Alfred Hudd suggested in 1908 that the name was derived from the surname "Amerike" or "ap Meryk" and was used on early British maps that have since been lost. Richard ap Meryk, anglicised to Richard Amerike, was a wealthy Anglo-Welsh merchant, royal customs officer and sheriff of Bristol. According to some writers, he was the principal owner of the Matthew, the ship sailed by John Cabot during his voyage of exploration to North America in 1497. The idea that Richard Amerike was a 'principal supporter' of Cabot has gained popular currency in the 21st century. There is no evidence to support this. Similarly, and contrary to a recent tradition that names Amerike as principal owner and main funder of the Matthew, Cabot's ship of 1497, academic enquiry does not connect Amerike with the ship. Her ownership at that date remains uncertain. Macdonald asserts that the caravel was specifically built for the Atlantic crossing.

The feminine form America was originally used to refer to the newly discovered continent, which is why it was accorded with the feminine names of the other continents: Asia, Africa, and Europa.

Since the 1950s, however, North America and South America have generally been considered by English speakers as separate continents, and taken together are called the Americas, or more rarely America. When conceived as a unitary continent, the form is generally the continent of America in the singular. However, without a clarifying context, singular America in English commonly refers to the United States of America.

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