{"record":{"aliases":[],"appointmentIds":["peru-69112a4d589c2f"],"appointmentsDataset":"https://chanceries.org/diplomats.json","archivalSources":["oral-history-catalog"],"canonicalUrl":"https://chanceries.org/diplopedia/people/roberto-guillermo-maclean-ugarteche-d9cf6eaa17/","countrySlug":"peru","entityId":"https://chanceries.org/diplopedia/people/roberto-guillermo-maclean-ugarteche-d9cf6eaa17/#person","eventIds":[],"expandedParagraphs":["Roberto Guillermo MacLean Ugarteche combined legal scholarship, judicial service, and diplomacy. He entered San Marcos in 1947 and studied law there and at Cambridge, obtaining a law qualification and a master’s in law. He became a judge of Peru’s Supreme Court and an international arbitrator, and taught at San Marcos before serving as dean of the law faculty at the Pontifical Catholic University.","He represented Peru in Washington in 1991–92. His ambassadorship ended amid the constitutional crisis provoked by Alberto Fujimori’s April 1992 dissolution of Congress. On 22 April, contemporary reporting listed his resignation alongside that of Peru’s OAS representative Luis Marchand.","MacLean’s later work returned to international law and legal education. He was one of Peru's lawyers at the International Court of Justice in its maritime case against Chile, on the team led by Allan Wagner. He also taught at Georgetown, Southern Methodist University, the Hague Academy of International Law, and the Royal Canadian Mounted Police Academy. In 2020, San Marcos preserved a multipart oral history interview about his family, education, and professional life."],"id":"peru:roberto guillermo maclean ugarteche","identifiers":{},"legacyPersonIds":[],"legacyUrl":"https://chanceries.org/diplomat-d9cf6eaa172f65914f0a.html","name":"Roberto Guillermo MacLean Ugarteche","notes":[],"paragraphSources":[["navy-legal-team","oral-history-catalog"],["navy-legal-team","resignation-1992"],["navy-legal-team","oral-history-catalog"]],"profileUrl":"diplomat-d9cf6eaa172f65914f0a.html","relatedEvents":[],"relatedPeople":[{"certainty":"documented","name":"Allan Wagner Tizón","note":"Named on the Peruvian ICJ maritime-case legal team led by agent Allan Wagner in the2013 account.","profileUrl":"diplomat-b96d83ee956732f236e4.html","sourceIds":["navy-legal-team"],"targetId":"peru:allan wagner tizon","type":"worked_with"}],"relationships":[{"certainty":"documented","note":"Named on the Peruvian ICJ maritime-case legal team led by agent Allan Wagner in the2013 account.","sourceIds":["navy-legal-team"],"targetId":"peru:allan wagner tizon","type":"worked_with"}],"researchStatus":"reviewed","reviewedOn":"2026-10-28","revision":"89a5b4d52c903870","sources":[{"accessedOn":"2026-10-28","date":"2013","id":"navy-legal-team","locator":"Revista32,pp.161–163","publisher":"Instituto de Estudios Histórico-Marítimos del Perú","title":"Equipo peruano ante la Corte Internacional de Justicia de La Haya","type":"institutional-history","url":"https://archivohistoricodemarina.mil.pe/repo/data/DOCUMENTOS/BIBLIOTECA/HEMEROTECA/2.%20Revista%20del%20Instituto%20de%20Estudios%20Hist%C3%B3rico-Mar%C3%ADtimos%20del%20Per%C3%BA/pdf/Revista%20del%20Instituto%20de%20Estudios%20Hist%C3%B3rico-Mar%C3%ADtimos%20del%20Per%C3%BA%20Nro.%2032%20%20A%C3%B1o%202013.pdf"},{"accessedOn":"2026-10-28","date":"1992-04-22","id":"resignation-1992","locator":"Grietas en el Ejecutivo","publisher":"El País; Gustavo Gorriti","title":"El Congreso desafía a Fujimori y proclama presidente de Perú a Máximo San Román","type":"contemporary-report","url":"https://elpais.com/diario/1992/04/22/internacional/703893615_850215.html"},{"accessedOn":"2026-10-28","date":"2020-07-07","id":"oral-history-catalog","locator":"Named archival item or collection description","publisher":"Universidad Nacional Mayor de San Marcos","title":"Entrevista a Roberto MacLean Ugarteche (Año de ingreso:1947)","type":"archive","url":"https://repositorio.unmsm.edu.pe/handle/UNMSM/916"},{"accessedOn":"","date":"","id":"mission-7c6732d6b6a8cca83a5b","locator":"Indexed full text retrieved. Records Ramos as chargé ad interim on 28 February 1975 and Arce’s appointment on 19 March; Rivero as chargé ad interim on 26 December 1982 and Pastor’s appointment on 3 June 1983. These bound the interim-event notes; appointment is not treated as a verified handover day. Also confirms Berckemeyer’s ambassador role. Direct archive opens returned technical difficulties.","publisher":"","title":"Diplomatic Representation for the Republic of Peru","type":"Mission record","url":"https://2009-2017.state.gov/s/cpr/rls/94363.htm"},{"accessedOn":"","date":"","id":"mission-67d8adec56bac71643b9","locator":"","publisher":"","title":"Roberto Guillermo MacLean Ugarteche — mission record (1991–1992)","type":"Mission record","url":"https://www.peruembassy.site/past-ambassadors"},{"accessedOn":"","date":"","id":"mission-52ab157700c690161964","locator":"Contemporary reporting identifies MacLean’s resignation in protest. Short paraphrase.","publisher":"","title":"Peru’s leader sets dates for return to democracy, 22 April 1992","type":"Mission record","url":"https://www.washingtonpost.com/archive/politics/1992/04/22/perus-leader-sets-dates-for-return-to-democracy/9a2699a6-ad6b-4c4e-aa1c-59539fd63017/"}],"topics":["international law","maritime delimitation","judicial reform"]},"schemaVersion":1}