Fifth Republic Movement
Venezuela historiography recognizes four "republics," or major regime changes since the country was founded in 1811. The First Republic, known as the "Venezuelan Confederation" lasted until 1812. The Second Republic is the restored republican regime that was instituted by Simón Bolívar after his Admirable Campaign in 1813, and which lasted until 1814. The Third Republic refers to the period after 1816 in which various patriot guerrilla bands joined under Bolívar's leadership in the Llanos of Venezuela and set up an independent government. This process culminated in the Congress of Angostura, but shortly thereafter the Congress declared Venezuela to be part of a larger Gran Colombia. Gran Colombia lasted only a decade and at its dissolution Venezuela became once again the "Republic of Venezuela," which is considered the start of the Fourth Republic. In 1864 the country was then restructured into the "United States of Venezuela", before reverting once again to the name, "Republic of Venezuela" in 1953. Although both periods began with the implementation of new constitutions (the fourth and twenty-fourth constitutions, respectively), both have been deemed by Venezuelan historiography as a continuation of the Fourth Republic.
Republic of Venezuela
After a military "coup d'état" on 23 January 1958 sent General Marcos Pérez Jiménez into exile, Venezuela's three main political parties signed the Punto Fijo Pact. The ensuing elections brought Rómulo Betancourt, who had been president from 1945 to 1948, back to power. Betancourt's government halted grants to multinational oil companies, created a Venezuelan oil corporation, and helped establish OPEC in 1960, an initiative led by Development Minister Juan Pablo Pérez Alfonso. The administration also introduced a new constitution in 1961, dividing the government into executive, legislative, and judicial branches; pursued agricultural reform; and promoted an international doctrine in which Venezuela only recognised governments elected by popular vote.