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immigration,entrance of a person (an alienalien,
in law, any person residing in one political community while owing allegiance to another. A procedure known as naturalization permits aliens to become citizens.
Each nation establishes conditions upon which aliens will be admitted, and makes laws concerning them.
..... Click the link for more information. ) into a new country for the purpose of establishing permanent residence. Motives for immigration, like those for migration generally, are often economic, although religious or political factors may be very important. High rates of immigration are frequently accompanied by militant, and sometimes violent, calls for immigration restriction or deportation by nationalist groups. See also naturalizationnaturalization,
official act by which a person is made a national of a country other than his or her native one. In some countries naturalized persons do not necessarily become citizens but may merely acquire a new nationality.
..... Click the link for more information. .
Immigration in the United States
From 1820 to 1930, the United States received about 60% of the world's immigrants. Populationpopulation,
the inhabitants of a given area, but perhaps most importantly, the human inhabitants of the earth (numbering about 7.5 billion in 2017), who by their increasing numbers and corresponding increasing needs can seriously affect the global ecosystem.
..... Click the link for more information. expansion in developed areas of the world, improved methods of transportation, and U.S. desire to populate available space were all factors in this phenomenon. Through the 19th cent., the United States was in the midst of agricultural, then industrial, expansion. The desire for cheap, unskilled labor and the profits to be made importing immigrants fueled the movement. Immigrants were largely responsible for the rapid development of the country, and their high birthrates did much to swell the U.S. population. Often, however, immigrants formed distinct ethnic neighborhoods, tending to remain somewhat isolated from the wider culture. Frequently exploited, some immigrants were accused by organized labor of lowering wages and living standards, though other groups of immigrants rapidly became mainstays of the labor movement. Opposition was early manifested by such organizations as the Know-Nothing movementKnow-Nothing movement,
in U.S. history. The increasing rate of immigration in the 1840s encouraged nativism. In Eastern cities where Roman Catholic immigrants especially had concentrated and were welcomed by the Democrats, local nativistic societies were formed to combat
..... Click the link for more information. and in violent anti-Chinese riots on the West Coast.
Restrictions placed on immigration were often based on race or nationality. There were also restrictions against the entrance of diseased persons, paupers, and other undesirables, and laws were passed for the deportationdeportation,
expulsion of an alien from a country by an act of its government. The term is not applied ordinarily to sending a national into exile or to committing one convicted of crime to an overseas penal colony (historically called transportation).
..... Click the link for more information. of aliens. The first permanent quota law was passed in 1924; it also provided for a national origins plan to be put into effect in 1929. In 1952, the Immigration and Nationality Act (the McCarran-Walter Act) was passed; while abolishing race as an overall barrier to immigration, it kept particular forms of national bias. The act was amended in 1965, abolishing the national origins quota. Despite overall limits, immigration to the United States has burgeoned since 1965, and the 1980s saw the highest level of new immigrants since the first decade of the 20th cent.
In 1986, Congress passed legislation that sought to limit the numbers of undocumented or illegal aliens living in America, imposing stiff fines on employers who hired them and giving legal status to a number of aliens who had already lived in the United States for some time. The Immigration Act of 1990 raised the total quota for immigrants and reorganized the preference system for entrance. The 1996 Illegal Immigration and Reform Responsibility Act led to massive deportations of illegal immigrants. Its provisions were later softened under political and legal attack, but a stricter approach to immigrants in general was adopted by the government following the Sept. 11, 2001, terror attacks.
A number of states have also enacted legislation designed to combat illegal immigration. The state laws appear not to have led to any significant convictions, but in some cases they have increased tensions with the local Hispanic minority and led to a migration of Hispanics, whether illegal immigrants or not, from the state. A 2012 Supreme Court decision concerning Arizona's law largely reserved to the federal government the right to enact and enforce immigration law while permitting state law enforcement officers to review a person's immigration status.
Immigration in Other Countries
Canada, in the first third of the 20th cent., began to receive an increasing number of immigrants, attracted by the expansion of agriculture in the west and the development of industry in the east. Australia and New Zealand received many European immigrants in the 19th cent.; the former country has been characterized by a preference for immigrants of British stock and by a policy of excluding Africans and Asians that dated from the late 19th cent. After 1965, however, this policy began to change; by the 1970s Australia had abandoned the system of racial preferences, and Asian immigration rapidly increased. Two major trends in immigration emerged after World War II: Australia and New Zealand became the countries with the highest rates of increase, and large numbers of Europeans immigrated to Africa. In recent decades, immigration to Europe from Asia and Africa has also substantially increased, as has emigration from Eastern Europe to the newly reunified Germany.
See studies by M. R. Davie (1983), I. Glazier and L. DeRosa (1986), V. N. Sinha (1987), D. R. Steiner (1987), and A. Richmond (1988).
(embryology) one of the processes of gastrulation, in which certain cells migrate to the inside of the embryo and distribute themselves under its surface layer.
entry into a country for the purpose of permanent or temporary residence by citizens of other countries.
Immigration has economic causes (the importation of a labor force or the entry into countries with more favorable working conditions, a higher standard of living, etc.), military causes (the capture of foreign lands and their military colonization), and political causes (flight from political, national, racial, religious, and other types of persecution, the exchange of national minorities among states, etc.).
Immigration has played a very important role in settling certain parts of the world and in forming the population of many of the world’s countries. Immigration has a vital influence on population dynamics; its demographic consequences are conditioned not only by the number of immigrants but also by their sex and age structure—there is a noticeable predominance among immigrants of young and middle-aged people and of men. Immigration leads to a mixing of various ethnic groups in the population, as a result of which new nations and nationalities are formed.
Immigration is characteristic of all historical periods. An enormous influence on the formation of the population of Eurasia was brought about by the migrations that have taken place during the past 2,000 years, such as the Great Migration of peoples throughout Europe (fourth to seventh century) and the migrations connected with the Arab conquests (seventh and eighth centuries) and with the expansion of the Turks and Mongols (11th to 17th century). The era of the great geographical discoveries (from the mid-15th to the mid-17th century) laid the foundation for the extensive growth of intercontinental migrations, for the most part from Europe to other parts of the world, primarily to America and Australia.
During the 20th century the pace of migration has not slackened, although the migrations themselves have acquired a different aspect in a great number of instances, such as the enormous population shifts connected with the two world wars; the resettlement of more than 16 million persons brought about by the partition of British India into two independent states—India and Pakistan; and the migrations connected with the resettlement of Jews in Israel, as well as the flight and ousting of Arabs. At the same time there are still significant shifts of population for economic reasons. Since World War II (1939–45) the immigration of a labor force into the developed countries of Western Europe has taken place on a wide scale (the number of such immigrants has reached 8 million, including 3.4 million to France, 2 million to the Federal Republic of Germany, 1 million—that is, 16 percent of the country’s population—to Switzerland, and so forth). The countries that are supplying the immigrants are Spain, Italy, Portugal, Greece, Turkey, and the countries of North Africa.
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