president of Venezuela from 1974 to 1979 and from 1989 to 1993.

Pérez began his political life as a member of the liberal political party Democratic Action, led by Rómulo Betancourt (Betancourt, Rómulo). When Betancourt took power as president of the junta that overthrew President Isaías Medina Angarita in 1945, Pérez followed as his secretary. A right-wing coup drove Pérez and other party leaders into exile until 1958, when the dictatorship of Marcos Pérez Jiménez was overthrown. Pérez then served in several important government and party posts. With Betancourt's support, Pérez easily won the 1973 presidential elections. The most important issues facing his administration concerned Venezuela's petroleum production, in particular the question of foreign ownership and how to invest the enormous proceeds received by the government. In 1976 Venezuela nationalized the entire oil industry, while maintaining foreign technical and managerial personnel to ensure efficient operation. Pérez also ordered a production slowdown to conserve resources, passed measures designed to stimulate small business and agriculture, and channeled petroleum income into hydroelectric projects, education programs, and steel mills. While preserving friendly relations with the United States, he underscored his policy of autonomy from it by supporting Panama's demand for control of the Panama Canal and reestablishing diplomatic relations with Cuba (broken in 1961).

As a former president, Pérez was barred by law from seeking reelection for 10 years. Upon that period's termination, Pérez was again elected to the presidency, where he promoted free-market economic reforms. He survived two attempted military coups in 1992 but was removed from office in 1993. He was then arrested and imprisoned in 1994 on charges of embezzlement and misuse of public funds.