of urbanization and do not include large swaths of rural land, as do metropolitan areas. Metropolitan area Unlike an urban area, a metropolitan area includes not only the urban area, but also satellite cities plus intervening rural land that is socio-economically connected to the urban core city, typically by employment ties through commuting, with the urban core city being the primary labor market. In accordance with these definitions, the three largest population centers in the Americas are: Mexico City, anchor to the largest metropolitan area in the Americas; New York City, anchor to the largest urban area in the Americas; and São Paulo, the largest city proper in the Americas. All three cities maintain Alpha classification and large scale influence. Ethnology The population of the Americas is made up of the descendants of four large ethnic groups and their combinations. The Indigenous peoples of the Americas, being Amerindians and Inuit-Yupik-Unangan. Those of European ancestry, mainly Spanish, English, Irish, Portuguese, German, Italian, French, and Dutch. Those of African ancestry, mainly of West African descent. Asians, that is, those of East Asian, South Asian, and Southeast Asian ancestry. Mestizos (Métis people in Canada), those of mixed European and Amerindian ancestry. Mulattoes, people of mixed African and European ancestry. Zambos (Spanish) or Cafuzos (Portuguese), those of mixed African and Indigenous ancestry. The majority of the population live in Latin America, named for its predominant cultures, rooted in Latin Europe (including the two dominant languages, Spanish and Portuguese, both Romance languages), more specifically in the Iberian nations of Portugal and Spain (hence the use of the term Ibero-America as a synonym). Latin America is typically contrasted with Anglo-America, where English, a Germanic language, is prevalent, and which comprises Canada (with the exception of Francophone Canada rooted in Latin Europe [France]—see Quebec and Acadia) and the United States. Both countries are located in North America, with cultures deriving predominantly from Anglo-Saxon and other Germanic roots. Religion The most prevalent faiths in the Americas are as follows: Christianity (86 percent) Roman Catholicism: Practiced by 69 percent of the Latin American population (61 percent in Brazil whose Roman Catholic population of 134 million is the greatest of any nation's), approximately 24 percent of the United States' population and about 39 percent of Canada's. Protestantism: Practiced mostly in the United States, where half of the population are Protestant, Canada, with slightly more than a quarter of the population,