Introduction
Britain's American colonies broke with the mother country in 1776 and were recognized as the new nation of the
United States of America following the Treaty of Paris in 1783. During the 19th and 20th centuries,
37 new states were added to the original 13 as the nation expanded across
the North American continent and acquired a number of overseas possessions.
The two most traumatic experiences in the nation's history were the Civil War (1861-65)
and the Great Depression of the 1930s. Buoyed by victories in World Wars I and II and the end of the Cold War in 1991, the US remains the world's most powerful nation-state.o take advantage of its natural resources to rapidly develop its agricultural and manufacturing industries and to make a major contribution to the British effort in World Wars I and II. Long-term concerns include pollution, particularly depletion of the ozone layer, and management and conservation of coastal areas, especially the Great Barrier Reef. A referendum to change Australia's status, from a commonwealth headed by the British monarch to an independent republic, was defeated in 1999. On 26 January 1788, European settlers reached Port Jackson and established a settlement in what is now Sydney. Although Australia was not officially settled by European explorers until 1788, evidence suggests the land had already been inhabited by Aboriginal people for more than 60,000 years.

Geography
American geography through the filters of six main regions:
- New England, made up of Maine, New Hampshire, Vermont, Massachusetts, Connecticut, and Rhode Island.
- The Middle Atlantic, comprising New York, New Jersey, Pennsylvania, Delaware, and Maryland.
- The South, which runs from Virginia south to Florida and west as far as central Texas. This region also includes West Virginia, Kentucky, Tennessee, North Carolina, South Carolina, Georgia, Alabama, Mississippi, Arkansas, Louisiana, and parts of Missouri and Oklahoma.
- The Midwest, a broad collection of states sweeping westward from Ohio to Nebraska and including Michigan, Indiana, Wisconsin, Illinois, Minnesota, Iowa, parts of Missouri, North Dakota, South Dakota, Kansas, and eastern Colorado.
- The Southwest, made up of western Texas, portions of Oklahoma, New Mexico, Arizona, Nevada, and the southern interior part of California.
- The West, comprising Colorado, Wyoming, Montana, Utah, California, Nevada, Idaho, Oregon, Washington, Alaska, and Hawaii.
The Climate is mostly temperate, but tropical in Hawaii and Florida, arctic in Alaska, semiarid in the great plains west of the Mississippi River, and arid in the Great Basin of the southwest; low winter temperatures in the northwest are ameliorated occasionally in January and February by warm chinook winds from the eastern slopes of the Rocky Mountains.

Economic Growth
The US has the largest and most technologically powerful economy in the world, with a per capita GDP of $37,600. In this market-oriented economy, private individuals
and business firms make most of the decisions, and the federal and state governments buy needed goods and services predominantly in the private marketplace.
US business firms enjoy considerably greater flexibility than their counterparts in Western Europe and Japan in decisions to expand capital plant,
lay off surplus workers, and develop new products. At the same time, they face higher barriers to entry in their rivals' home markets than the barriers
to entry of foreign firms in US markets. US firms are at or near the forefront in technological advances, especially in computers and in medical, aerospace, and military equipment,
although their advantage has narrowed since the end of World War II. The onrush of technology largely explains the gradual development of a "two-tier labor market" in which those at the bottom lack the education and the professional/technical skills of those at the top and, more and more, fail to get comparable pay raises, health insurance coverage, and other benefits.The years 1994-2000 witnessed solid increases in real output, low inflation rates, and a drop in unemployment to below 5%.
The year 2001 saw the end of boom psychology and performance, with output increasing only 0.3% and unemployment and business failures rising substantially. The response to the terrorist attacks of 11 September 2001 showed the remarkable resilience of the economy. Moderate recovery took place in 2002, with the GDP growth rate rising to 2.45%. A major short-term problem in first half 2002 was a sharp decline in the stock market, fueled in part by the exposure of dubious accounting practices in some major corporations. The war in March/April 2003 between a US-led coalition and Iraq shifted resources to military industries and introduced uncertainties about investment and employment in other sectors of the economy. Long-term problems include inadequate investment in economic infrastructure, rapidly rising medical and pension costs of an aging population, sizable trade deficits, and stagnation of family income in the lower economic groups.

Culture
The story of the American people is a story of immigration and diversity. The United States has welcomed more immigrants than any other country -- more than 50 million in all -- and still admits between 500,000 and 1 million persons a year. Americans have placed greater value on diversity, ethnic groups have renewed and celebrated their heritage, and the children of immigrants often grow up being bilingual.
It is not uncommon to walk down the streets of an American city today and hear Spanish spoken. In 1950 fewer than 4 million U.S. residents were from Spanish-speaking countries. Today that number is about 35 million. The widespread use of Spanish in American cities has generated a public debate over language. Some English speakers point to Canada, where the existence of two languages (English and French) has been accompanied by a secessionist movement. To head off such a development in the United States, some citizens are calling for a law declaring English the official American language.
Regional differences also make themselves felt in less tangible ways, such as attitudes and outlooks. An example is the attention paid to foreign events in newspapers. In the East, where people look out across the Atlantic Ocean, papers tend to show greatest concern with what is happening in Europe, the Middle East, Africa, and western Asia. On the West Coast, news editors give more attention to events in East Asia and Australia.

Education
American education is a complex topic because a single school can draw upon resources from several different public and private institutions. For example, a student may attend a private high school whose curriculum must meet standards set by the state, some of whose science courses may be financed by federal funds, and whose sports teams may play on local, publicly owned fields.
Almost 90 percent of American students below the college level attend public elementary and secondary schools, which do not charge tuition but rely on local and state taxes for funding. Traditionally, elementary school includes kindergarten through the eighth grade.
The United States does not have a national school system. Nor, with the exception of the military academies (for example, the U.S. Naval Academy in Annapolis, Maryland), are there schools run by the federal government. But the government provides guidance and funding for federal educational programs in which both public and private schools take part, and the U.S. Department of Education oversees these programs.
In American parlance, a college is a four-year institution of higher learning that offers courses in related subjects. A liberal arts college, for example, offers courses in literature, languages, history, philosophy, and the sciences, while a business college offers courses in accounting, investment, and marketing. Many colleges are independent and award bachelor's degrees to those completing a program of instruction that typically takes four years.
Every state has its own university, and some states operate large networks of colleges and universities: The State University of New York, for instance, has more than 60 campuses in New York State. Some cities also have their own public universities. In many areas, junior or community colleges provide a bridge between high school and four-year colleges for some students. In junior colleges, students can generally complete their first two years of college courses at low cost and remain close to home.

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