About 10,000 years ago, migrating Indians settled in fertile valleys and along the coast of what is now Chile. The Incas briefly extended their empire into what is now northern Chile, but the area's remoteness prevented extensive settlement.
In 1541, the Spanish, under Pedro de Valdivia, encountered hundreds of thousands of Indians from various cultures in the area that modern Chile now occupies. These cultures supported themselves principally through slash-and-burn agriculture and hunting. Although the Spanish did not find the extensive gold and silver they sought, they recognized the agricultural potential of Chile's central valley, and Chile became part of the Viceroyalty of Peru.
The drive for independence from Spain was precipitated by usurpation of the Spanish throne by Napoleon's brother Joseph. A national junta in the name of Ferdinand -- heir to the deposed king -- was formed on September 18, 1810. Spanish attempts to reimpose arbitrary rule during what was called the Reconquista led to a prolonged struggle under Bernardo O'Higgins, Chile's most renowned patriot. Chilean independence was formally proclaimed on February 12, 1818.
The political revolt brought little social change, however, and 19th century Chilean society preserved the essence of the stratified colonial social structure, family politics, and the influence of the Roman Catholic Church. The system of presidential power eventually predominated, but wealthy landowners continued to control Chile.
Toward the end of the 19th century, government in Santiago consolidated its position in the south by persistently suppressing the Mapuche Indians. In 1881, it signed a treaty with Argentina confirming Chilean sovereignty over the Strait of Magellan. As a result of the War of the Pacific with Peru and Bolivia (1879-83), Chile expanded its territory northward by almost one-third and acquired valuable nitrate deposits, the exploitation of which led to an era of national affluence.
Chile established a parliamentary-style democracy in the late 19th century, which tended to protect the interests of the ruling oligarchy. By the 1920s, the emerging middle and working classes were powerful enough to elect a reformist president, whose program was frustrated by a conservative congress. Continuing political and economic instability resulted in the quasi-dictatorial rule of General Carlos Ibanez (1924-32).
When constitutional rule was restored in 1932, a strong middle-class party, the Radicals, emerged. It became the key force in coalition governments for the next 20 years. In the 1920s, Marxist groups with strong popular support developed. During the period of Radical Party dominance (1932-52), the state increased its role in the economy.
The 1964 presidential election of Christian Democrat Eduardo Frei-Montalva (father of the current president) by an absolute majority initiated a period of major reform. Under the slogan "Revolution in Liberty," the Frei Administration embarked on far-reaching social and economic programs, particularly in education, housing, and agrarian reform, including rural unionization of agricultural workers. By 1967, however, Frei encountered increasing opposition from leftists, who charged that his reforms were inadequate, and from conservatives, who found them excessive.
In 1970, Dr. Salvador Allende, a Marxist and member of Chile's Socialist Party, who headed the "Popular Unity" (UP) coalition of Socialists, Communists, Radicals, and dissident Christian Democrats, was elected by a narrow margin. His program included the nationalization of most remaining private industries and banks, massive land expropriation, and collectivization. Allende's proposal also included the nationalization of U.S. interests in Chile's major copper mines. Elected with only 36% of the vote and by a plurality of only 36,000 votes, Allende never enjoyed majority support in the Chilean Congress or broad popular support. Domestic production declined, severe shortages of consumer goods, food, and manufactured products were widespread and inflation reached 1,000% per annum. Mass demonstrations, recurring strikes, violence by both government supporters and opponents, and widespread rural unrest ensued in response to the general deterioration of the economy. By 1973, Chilean society had split into two hostile camps. A military coup overthrew Allende on September 11, 1973. As the armed forces bombarded the presidential palace, Allende reportedly committed suicide.