Javier Felipe Ricardo Pérez de Cuéllar Guerra was a Peruvian diplomat and politician who served as the fifth secretary-general of the United Nations from 1982 to 1991. He later served as prime minister of Peru from 2000 to 2001.
His two terms as secretary-general coincided with the final decade of the Cold War, and he engaged in efforts to address the Iran–Iraq War, the Western Sahara conflict, the Cyprus problem, Namibian independence under the Tripartite Accord, the Soviet withdrawal from Afghanistan, the Gulf War, and the opening of the Croatian War of Independence.
Pérez de Cuéllar was a member of the Club of Madrid, a group of former heads of state and government, and the Inter-American Dialogue.