The history of Colombia includes its settlement by indigenous peoples and the establishment of agrarian societies, notably the Muisca Confederation, Quimbaya Civilization, and Tairona Chiefdoms.
From approximately 12,000 years BP onwards, hunter-gatherer societies existed near present-day Bogotá (at El Abra and Tequendama), and they traded with one another and with cultures living in the Magdalena River valley.
Beginning in the 1st millennium BCE, groups of Amerindians including the Muisca, Quimbaya, Tairona, Calima, Zenú, Tierradentro, San Agustín, Tolima and Urabá became skilled in farming, mining and metalcraft; and some developed the political system of cacicazgos with a pyramidal structure of power headed by caciques.
The Spanish made several attempts to settle along the north coast of today's Colombia in the early 16th century, but their first permanent settlement, at Santa Marta, dates from 1525.
In 1549, the institution of the Spanish Royal Audiencia in Bogotá gave that city the status of capital of New Granada, which comprised in large part what is now the territory of Colombia.
Lastly, Colombian society embraced inclusivity, emphasizing that rights should be granted "universally without notice of sex nor differences of color nor unjust preferences of fortune, nor distinctions of age".
Bolívar's supporters, who later formed the nucleus of the Conservative Party, sought strong centralized government, alliance with the Roman Catholic Church, and a limited franchise.
Santander's followers, forerunners of the Liberals, wanted a decentralized government, state rather than church control over education and other civil matters, and a broadened suffrage.
This period saw Colombia enact significant political reforms, such as the 1853 Constitution, which eliminated property and literacy requirements for voting, making it one of the most democratic nations of its time.
However, by the 1880s, Colombia shifted toward Western industrial modernity, prioritizing economic development and state centralization over the earlier focus on political rights, leading to the adoption of the 1886 Constitution and the end of its republican experiment.
The Thousand Days' War (1899–1902) cost an estimated 100.000 lives, and up to 300.000 people died during "La Violencia" of the late 1940s and 1950s, a bipartisan confrontation which erupted after the assassination of Liberal popular candidate Jorge Eliécer Gaitán.
When he did not restore democratic rule and occasionally engaged in open repression, however, he was overthrown by the military in 1957 with the backing of both political parties, and a provisional government was installed.
Although the system established by the Sitges agreement was phased out by 1974, the 1886 Colombian constitution — in effect until 1991—required that the losing political party be given adequate and equitable participation in the government, which, according to many observers and later analysis, eventually resulted in some increase in corruption and legal relaxation.
Both groups claimed to represent the poor and weak against the rich and powerful classes of the country, demanding the completion of true land and political reform from an openly Communist perspective.
By 1974, another challenge to the state's authority and legitimacy had come from 19th of April Movement (M-19), a mostly urban guerrilla group founded in response to an alleged electoral fraud during the final National Front election of Misael Pastrana Borrero (1970–1974) and the defeat of former dictator Gustavo Rojas Pinilla.
[26] Initially, the M-19 attracted a degree of attention and sympathy from mainstream Colombians that the FARC and National Liberation Army (ELN) had found largely elusive earlier due to extravagant and daring operations, such as stealing a sword that had belonged to Colombia's Independence hero Simon Bolívar.
By 1982, the perceived passivity of the FARC, together with the relative success of the government's efforts against the M-19 and ELN, enabled the administration of the Liberal Party's Julio César Turbay (1978–1982) to lift a state-of-siege decree that had been in effect, on and off, for most of the previous 30 years.
Citizen exhaustion due to the conflict's newfound intensity led to the election of president Belisario Betancur (1982–1986), a Conservative who won 47% of the popular vote, directed peace feelers at all the insurgents, and negotiated a 1984 cease-fire with the FARC and M-19 after a 1982 release of many guerrillas imprisoned during the previous effort to overpower them.
Pressure from the U.S. government and critical sectors of Colombian society was met with further violence, as the Medellín Cartel and its hitmen bribed or murdered numerous public officials, politicians and others who stood in its way by supporting the implementation of extradition of Colombian nationals to the U.S. Victims of cartel violence included Justice Minister Rodrigo Lara, whose assassination in 1984 made the Betancur administration begin to directly oppose the drug lords.
The Betancur administration, in turn, questioned the M-19's actions and its commitment to the peace process, as it continued to advance high-profile negotiations with the FARC, which led to the creation of the Patriotic Union (Colombia) (UP), a legal and non-clandestine political organization.
On November 6, 1985, the M-19 stormed the Colombian Palace of Justice and held the Supreme Court magistrates hostage, intending to put president Betancur on trial.
The Virgilio Barco (1986–1990) administration, in addition to continuing to handle the difficulties of the complex negotiations with the guerrillas, also inherited a particularly chaotic confrontation against the drug lords, who were engaged in a campaign of terrorism and murder in response to government moves in favor of their extradition overseas.
The M-19 and several smaller guerrilla groups were successfully incorporated into a peace process as the 1980s ended and the 1990s began, which culminated in the elections for a Constituent Assembly of Colombia that would write a new constitution, which took effect in 1991.
Contacts with the FARC, which had irregularly continued despite the generalized de facto interruptions of the ceasefire and the official 1987 break from negotiations, were temporarily cut off in 1990 under the presidency of César Gaviria (1990–1994).
However, a political crisis relating to large-scale contributions from drug traffickers to Samper's presidential campaign diverted attention from governance programs, thus slowing, and in many cases, halting progress on the nation's domestic reform agenda.
The new president's program was based on a commitment to bring about a peaceful resolution of Colombia's longstanding civil conflict and to cooperate fully with the United States to combat the trafficking of illegal drugs.
While early initiatives in the Colombian peace process gave reason for optimism, the Pastrana administration also has had to combat high unemployment and other economic problems, such as the fiscal deficit and the impact of global financial instability on Colombia.
and smaller movements, as well as the growth of drug production, corruption and the spread of even more violent paramilitary groups such as the United Self-Defense Forces of Colombia (AUC) has made it difficult to solve the country's problems.
[28] Some critical observers consider in retrospect that Uribe's policies, while admittedly reducing crime and guerrilla activity, were too slanted in favor of a military solution to Colombia's internal war, neglecting grave social and human rights concerns to a certain extent.
They hoped that Uribe's government would make serious efforts towards improving the human rights situation inside the country, protecting civilians and reducing any abuses committed by the armed forces.