Advanced indigenous cultures flourished in Ecuador long before the Inca Empire conquered the area in the 15th century. In 1534, the Spanish arrived and defeated the Inca armies, and Spanish colonists became the new elite. The indigenous population was decimated by disease in the first decades of Spanish rule--a time when the natives also were forced into the "encomienda" labor system for Spanish landlords. In 1563, Quito became the seat of a royal "audiencia" (administrative district) of Spain.

After independence forces defeated the royalist army in 1822, Ecuador joined Simon Bolivar's Republic of Gran Colombia, only to become a separate republic in 1830. The 19th century was marked by instability, with a rapid succession of rulers. The conservative Gabriel Garcia Moreno unified the country in the 1860s with the support of the Catholic Church. In the late 1800s, world demand for cocoa tied the economy to commodity exports and led to migrations from the highlands to the agricultural frontier on the coast.

A coastal-based liberal revolution in 1895 under Eloy Alfaro reduced the power of the clergy and opened the way for capitalist development. The end of the cocoa boom produced renewed political instability and a military coup in 1925. Populist politicians such as five-time President Jose Velasco Ibarra marked the 1930s and 1940s. In January 1942, Ecuador signed the Rio Protocol to end a brief war with Peru the year before. Ecuador agreed to a border that conceded to Peru much territory Ecuador previously had claimed in the Amazon. After World War II, a recovery in the market for agricultural commodities and the growth of the banana industry helped restore prosperity and political peace. From 1948-60, three presidents--beginning with Galo Plaza--were freely elected and completed their terms.

Recession and popular unrest led to a return to populist politics and domestic military interventions in the 1960s, while foreign companies developed oil resources in the Ecuadorian Amazon. In 1972, a nationalist military regime seized power and used the new oil wealth and foreign borrowing to pay for a program of industrialization, land reform, and subsidies for urban consumers. With the oil boom fading, Ecuador returned to democracy in 1979, but by 1982, the government faced an economic crisis, characterized by inflation, budget deficits, a falling currency, mounting debt service, and uncompetitive industries.

Leon Febres-Cordero of the Social Christian Party (PSC) narrowly won the 1984 presidential elections. During the first years of his administration, Febres-Cordero introduced free-market economic policies, took strong stands against drug trafficking and terrorism, and pursued close relations with the United States. His tenure was marred by bitter wrangling with other branches of government and his own brief kidnapping by elements of the military. A devastating earthquake in March 1987 interrupted oil exports and worsened the country's economic problems.

Rodrigo Borja of the Democratic Left (ID) party won the presidency in 1988. His government was committed to improving human rights protection and carried out some reforms. Most notably, Borja opened Ecuador up foreign trade. The Borja government concluded an accord leading to the disbanding of the small terrorist group, "Alfaro Lives." However, continuing economic problems undermined the popularity of the ID, and opposition parties gained control of Congress in 1990.

In 1992, Sixto Duran-Ballen won in his third run for the presidency. His government succeeded in pushing a limited number of modernization initiatives through Congress. Duran-Ballen's Vice President, Alberto Dahik, was the architect of the administration's economic policies, but in 1995, Dahik fled the country to avoid prosecution on corruption charges following a heated political battle with the opposition. A war with Peru erupted in January-February 1995 in a small, remote region where the boundary prescribed by the 1942 Rio Protocol was in dispute.

Abdala Bucaram, from the Guayaquil-based Ecuadorian Roldosista Party (PRE), won the presidency in 1996 on a platform that promised populist economic and social policies and the breaking of what Bucaram termed as the power of the nation's oligarchy. During his short term of office, Bucaram's administration drew criticism for corruption. The Congress deposed Bucaram in February 1997 on grounds of alleged mental incompetence. In his place, Congress named interim President Fabian Alarcon, who had been president of Congress and head of the small Radical Alfarist Front party. Alarcon's interim presidency was endorsed by a May 1997 popular referendum.

Congressional and first-round presidential elections were held on May 31, 1998. No presidential candidate obtained a majority, so a run-off election between the top two candidates--Quito Mayor Jamil Mahuad of the Popular Democracy party and Alvaro Noboa of the Ecuadorian Roldosista Party (PRE)--was held on July 12, 1998. Mahuad won by a narrow margin. He took office on August 10, 1998. On the same day, Ecuador's new constitution came into effect. Mahuad concluded a well-received peace with Peru on October 26, 1998, but increasing economic, fiscal, and financial difficulties drove his popularity steadily lower. On January 21, 2000, during demonstrations in Quito by indigenous groups, the military and police refused to enforce public order. Demonstrators entered the National Assembly building and declared a three-person "junta" in charge of the country. Field-grade military officers declared their support for the concept. During a night of confusion and negotiations, President Mahuad was obliged to flee the presidential palace. Vice President Gustavo Noboa took charge and Mahuad went on national television in the morning to endorse Noboa as his successor. Congress met in emergency session in Guayaquil the same day, January 22, and ratified Noboa as President of the Republic in constitutional succession to Mahuad.

By completing Mahuad’s term, Noboa restored some stability to Ecuador. He implemented the dollarization that Mahuad had announced, and he obtained congressional authorization for the construction of Ecuador’s second major oil pipeline, this one financed by a private consortium. Noboa turned over the government on January 15, 2003, to his successor, Lucio Gutierrez, a former army colonel who first came to the public’s attention as a leader of the January 2000 events that led to Mahuad’s departure from the presidency. Anti-corruption was a main theme of Gutierrez’s campaign. Gutierrez’s party has a small fraction of the seats in Congress, and he therefore depends on the support of other political parties to pass legislation. He has attempted some economic reforms. On November 9, 2004, an opposition coalition tried but failed to create a Special Congressional Commission to impeach the president on various grounds.