{"record":{"aliases":[],"appointmentIds":["brazil-320e2ebcd153a4"],"appointmentsDataset":"https://chanceries.org/diplomats.json","archivalSources":[],"canonicalUrl":"https://chanceries.org/diplopedia/people/mario-gibson-alves-barboza-9606e4206a/","countrySlug":"brazil","entityId":"https://chanceries.org/diplopedia/people/mario-gibson-alves-barboza-9606e4206a/#person","eventIds":[],"expandedParagraphs":["Mário Gibson Alves Barboza qualified in law in Recife and entered diplomacy in 1939. His early American service began at the Houston consulate and continued at the Washington embassy during and after the Second World War. After assignments in Brussels, Buenos Aires, and the United Nations, he became ambassador in Austria and Paraguay. A short appointment as ambassador in Washington in 1969 ended when General Emílio Médici brought him home as foreign minister.","As minister from 1969 to 1974, Gibson expanded Brazil’s contacts in Africa and Latin America and oversaw the foreign ministry’s move to Brasília. In April 1973 he signed the Itaipu Treaty with Paraguayan foreign minister Raúl Sapena Pastor. The treaty created a jointly owned entity to develop hydroelectric resources of the Paraná River, with equal Brazilian and Paraguayan participation and detailed arrangements for power, financing, and administration.","His diplomacy also defended the military government. In a November 1970 conversation with American ambassador William Rountree, Gibson acknowledged that abuses might have occurred but denied that the government sanctioned them. Rountree’s record links these exchanges to American congressional criticism and to unresolved commercial and maritime disputes.","Gibson later headed embassies in Greece, Italy, and Britain. In London he also protected Argentine interests after the 1982 Falklands/Malvinas war had broken diplomatic relations between Argentina and Britain. Retiring in 1986, he published the memoir Na diplomacia, o traço todo da vida in 1992. He died in 2007."],"id":"brazil:mario gibson alves barboza","identifiers":{},"legacyPersonIds":[],"legacyUrl":"https://chanceries.org/diplomat-9606e4206a2d2dd64eb7.html","name":"Mário Gibson Alves Barboza","notes":[],"paragraphSources":[["fgv-biography"],["fgv-biography","itaipu-treaty"],["frus-rountree-1970"],["fgv-biography"]],"profileUrl":"diplomat-9606e4206a2d2dd64eb7.html","relatedEvents":[],"relatedPeople":[],"relationships":[],"researchStatus":"reviewed","reviewedOn":"2026-10-28","revision":"7bd1781820fee226","sources":[{"accessedOn":"2026-10-28","date":"","id":"fgv-biography","locator":"Career; foreign ministry; later embassies","publisher":"FGV CPDOC","title":"Mário Gibson Alves Barbosa","type":"scholarship","url":"https://www18.fgv.br/cpdoc/acervo/dicionarios/verbete-biografico/mario-gibson-alves-barbosa"},{"accessedOn":"2026-10-28","date":"1973-08-28","id":"itaipu-treaty","locator":"Treaty preamble and ArticlesI–XIII","publisher":"Câmara dos Deputados","title":"Decreto72707/1973 and Itaipu Treaty","type":"primary-record","url":"https://www2.camara.leg.br/legin/fed/decret/1970-1979/decreto-72707-28-agosto-1973-421325-publicacaooriginal-1-pe.html"},{"accessedOn":"2026-10-28","date":"1970-11-12","id":"frus-rountree-1970","locator":"FRUS1969–1976,vol.E–10,document129","publisher":"U.S. Department of State, Office of the Historian","title":"Telegram517: Meeting with Foreign Minister","type":"primary-record","url":"https://history.state.gov/historicaldocuments/frus1969-76ve10/d129"},{"accessedOn":"","date":"Accessed 22 October 2026","id":"mission-e86b2f854c50aec0986d","locator":"Retrieved as full public HTML on 22 October 2026. Start/End of Mission fields, with Nestor Forster’s separate acting appointment.","publisher":"","title":"Embassy of Brazil: official ambassadors, mission dates and acting-service footnote","type":"Mission record","url":"https://www.gov.br/mre/pt-br/embaixada-washington/English/galeria-de-embaixadores"},{"accessedOn":"","date":"Accessed 22 October 2026","id":"mission-62664b5e08dd6454fab5","locator":"Barbosa’s own account of embassy support for Projeto Resgate.","publisher":"","title":"Rubens Barbosa: archival-recovery initiative, foreword pp. 30–31","type":"Mission record","url":"https://funag.gov.br/loja/download/753-guia_dos_arquivos_americanos.pdf"},{"accessedOn":"","date":"","id":"mission-220d8dcd3927ec9bbbb4","locator":"","publisher":"","title":"Mário Gibson Alves Barboza — mission record (1969)","type":"Mission record","url":"https://funag.gov.br/loja/download/364-Personalidades_da_PolItica_Externa_Brasileira.pdf"}],"topics":[]},"schemaVersion":1}