Chilean transition to democracy in the context of Presidential Republic (1925–1973)

The Government Junta of Chile (Spanish: Junta de Gobierno de Chile) was the military junta established to rule Chile during the military dictatorship that followed the overthrow of President Salvador Allende in the 1973 Chilean coup d'état. The Government Junta was the executive and legislative branch of government until 17 December 1974, when Augusto Pinochet was formally declared President of Chile. After that date, it functioned strictly as a legislative body until the return to democracy in 1990.

The Political Constitution of the Republic of Chile of 1980 (Spanish: Constitución Política de la República de Chile) is the fundamental law in force in Chile. It was approved and promulgated under the military dictatorship headed by Augusto Pinochet, being ratified by the Chilean citizenry through a referendum on September 11, 1980, although being held under restrictions and without electoral registers. While 69% of the population was reported to have voted yes, the vote was questioned by hundreds of denunciations of irregularities and fraud. The constitutional text took effect, in a transitory regime, on March 11, 1981, and then entered into full force on March 11, 1990, with the return to electoral democracy. It was amended for the first time in 1989 (through a referendum), and afterward in 1991, 1994, 1997, each year from 1999 to 2001, 2003, each year from 2007 to 2015, and each year from 2017 to 2021, with the last three amendments concerning the constituent process of 2020–2022. In September 2005, under Ricardo Lagos's presidency, a large amendment of the Constitution was approved by parliamentarians, removing from the text some of the less democratic dispositions coming from Pinochet's regime, such as senators-for-life and appointed senators, as well as the armed forces' warranty of the democratic regime.

On November 15, 2019, following a series of popular protests in October 2019, a political agreement between parties with parliamentary representation called for a national referendum on the proposal of writing a new Constitution and on the mechanism to draft it. A plebiscite held on October 25, 2020, approved drafting a new fundamental charter, as well as choosing by popular vote delegates to a Constitutional Convention which was to fulfill this objective. The members of the convention were elected in May 2021, and first convened on July 4, 2021. However, on September 4, 2022, voters rejected the new constitution in the constitutional referendum. Following the rejection, the Expert Commission drafted another new constitution for the Constitutional Council to amend. However, on December 15, 2023, voters rejected the constitution in the 2023 Chilean constitutional referendum.

The territory of Chile has been populated since at least 3000 BC. By the 16th century, Spanish invaders began to raid the region of present-day Chile, and the territory was a colony from 1540 to 1818, when it gained independence from Spain. The country's economic development was successively marked by the export of first agricultural produce, then saltpeter and later copper. The wealth of raw materials led to an economic upturn, but also led to dependency, and even wars with neighboring states. Chile was governed during most of its first 150 years of independence by different forms of restricted government, where the electorate was carefully vetted and controlled by an elite.

Failure to address the economic and social increases and increasing political awareness of the less-affluent population, as well as indirect intervention and economic funding to the main political groups by the CIA, as part of the Cold War, led to a political polarization under Socialist president Salvador Allende. This in turn resulted in the 1973 coup d'état and the military dictatorship of General Augusto Pinochet, whose seventeen-year regime was responsible for many human rights violations and deep market-oriented economic reforms. In 1990, Chile made a peaceful transition to democracy and initiate a succession of democratic governments.