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Fidel Castro Díaz-Balart

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Fidel Castro Díaz-Balart
Fidel Castro Díaz-Balart.jpg Fidel Castro Díaz-Balart.jpg
BornFidel Ángel Castro Díaz-Balart
(1949-09-01)1 September 1949
Havana, Cuba
💀Died1 February 2018(2018-02-01) (aged 68)
Havana, Cuba1 February 2018(2018-02-01) (aged 68)
🏳️ NationalityCuban
🎓 Alma materMoscow State University
💼 Occupation
Nuclear physicist
👴 👵 Parent(s)Fidel Castro
Mirta Diaz-Balart

Fidel Ángel Castro Díaz-Balart (1 September 1949 – 1 February 2018) was a Cuban nuclear physicist and government official. Frequently known by the diminutive Fidelito,[1] he was the eldest son of Cuban leader Fidel Castro and his first wife, Mirta Diaz-Balart.[2][3][4][5]

Life and career[edit]

Castro Díaz-Balart (left) with President of Mexico Enrique Peña Nieto, 28 January 2014, 2nd CELAC Summit, Havana.

Castro Díaz-Balart's parents divorced in 1955, prior to the Cuban Revolution in which his father seized power in that country. His mother moved to Miami, United States, with the Diaz-Balart family, taking her son with her. Castro Díaz-Balart returned to Cuba as a child to visit his father, and remained there thereafter for the rest of his childhood.[6] His first public appearance was in 1959, when he appeared as a 9-year-old during an interview with his father on U.S. television.[7]

Castro Díaz-Balart moved to Moscow, then in the Soviet Union, where he enrolled at Voronezh State University in 1968.[8] For safety, he studied under the code name "José Raúl Fernández",[9] which he claimed to have chosen in homage to world chess champion José Raúl Capablanca and to have later used to publish 30 scientific publications.[10] He initially studied physical education before switching to nuclear physics in 1970.[8] He graduated from Lomonosov Moscow State University, and went on to work at the Joint Institute for Nuclear Research in Dubna, and to receive his first doctorate from Lomonosov, in 1978.[11][8][1] Returning to Cuba, he was placed in charge of Cuba's nuclear power program for a time, leading the Juragua Nuclear Power Plant construction program from 1980 to 1992, during which time he was also the executive secretary of the country's Atomic Energy Commission.[12] He served as a member of the Nonaligned Countries Movement's Coordinating Countries for the Peaceful Use of Nuclear Energy, and was elected to chair the Second Meeting of that group in April 1983.[13] Castro Díaz-Balart was removed from his positions in June 1992, following a falling out with his father, who cited "inefficiency" as the reason for the removal.[14] Castro then announced the suspension of construction at Juragua in September 1992, due to Cuba's inability to meet the financial terms set by Russia to complete the reactors.[14]

Castro Díaz-Balart then returned to further his studies in Moscow, and received his second doctorate at the Kurchatov Institute of Atomic Energy in 1999.[8] In the 2010s, he returned to a level of prominence, serving as a scientific advisor to the Council of State and as vice-president of the Academy of Sciences of Cuba,[15] positions that he still held at the time of his death.[16] Throughout his career, Castro Diaz-Balart authored articles on the developing role of nuclear energy.[17]

In 2012, Castro Diaz-Balart disputed reports that Fidel Castro was becoming senile, describing his father as "lucid" and "working hard",[18] which was similar to the "upbeat assessment" of Castro's health that Castro Diaz-Balart made in February 2007, following Castro's illness during that period.[19]

In April 2014, he visited Russia to declare Cuba's recognition of the annexation of Crimea by the Russian Federation, also receiving an honorary doctorate at Voronezh State University.[8] In February 2015, during the Cuban thaw towards the end of the Obama Administration, when Americans were more freely allowed to visit Cuba, he participated in events to welcome American celebrities to the island, mingling with Paris Hilton and Naomi Campbell.[20][21] The following month, he visited Novosibirsk, Russia, meeting with the mayor, Anatoly Lokot, and regional governor Vladimir Gorodetsky to improve Cuban relations with scientific institutions in the region.[11]


See also: Díaz-Balart family

Castro Díaz-Balart had three children — Mirta María, Fidel Antonio and José Raúl — with Natasha Smirnova, whom he met in Russia. After divorcing Smirnova, he married María Victoria Barreiro from Cuba.[22] U.S. Congressman Mario Díaz-Balart, currently representing the 25th district of Florida, is his cousin.


Castro Díaz-Balart committed suicide in Havana on 1 February 2018, aged 68.[23] He had previously received outpatient care for depression.[24][25][26] The report of his suicide by the Cuban government was described as "unusually public."[27]

At his death he held the position of vice president of the Cuban Academy of Sciences and scientific advisor to the Council of State, the governing body of Cuba.


  • Ciencia, innovación y futuro (Grijalbo: 2002) ISBN 8425336503, 9788425336508 Search this book on Amazon.com Logo.png.
  • Energía nuclear y desarrollo: realidades y desafíos en los umbrales del siglo XXI (Colihue:1991) ISBN 9505816618 Search this book on Amazon.com Logo.png.
  • Espacio y tiempo en la filosofia y la fisica (Vadell: 1990) ISBN 9802322547, 9789802322541 Search this book on Amazon.com Logo.png.
  • Ciencia, tecnología y sociedad: hacia un desarrollo sostenible en la era de la globalización (Editorial Científico-Técnica: 2003) ISBN 9590105289, 9789590105289 Search this book on Amazon.com Logo.png.


  1. 1.0 1.1 "FIDEL CASTRO Díaz-Balart, "FIDELITO". History of Fidel Castro Ruz first-born son". The Cuban History. November 27, 2017.
  2. "Who Is Fidel Castro Diaz-Balart? Oldest Son of Deceased Leader Fidel Castro Committed Suicide". Newsweek. 1 February 2018.
  3. Sanchez, Juan Reinaldo (20 March 2016). "Hidden wives, mistresses and kids: Fidel Castro's secret life". New York Post. Retrieved 2 February 2018.
  4. Dwilson, Stephanie Dube (26 November 2016). "Fidel Castro's Children: The Family He Left Behind". Heavy.com. Retrieved 2 February 2018.
  5. Geisler, Bob. "Hamburgs Wirtschaftssenator zu Besuch bei Fidel Castros Sohn". Hamburger Abendblatt (in Deutsch). Retrieved 2 February 2018.
  6. "Cuba: Fidel Castro's son 'takes own life'". BBC News. 1 February 2018.
  7. "Fidel Castro 1959 (starting at 2:00)". Youtube. 1959. Retrieved February 2, 2018.
  8. 8.0 8.1 8.2 8.3 8.4 "Visiting Russia, Fidel Castro's Son Scoffs at U.S. Sanctions Over Crimea". The Moscow Times. April 1, 2014.
  9. ""Fidelito" ist tot". DPA-Article in Der Tagesspiegel. February 2, 2018.
  10. Stone, Richard (2 February 2018). "Fidel Castro's eldest son, a physicist, is victim of apparent suicide". Science.
  11. 11.0 11.1 Pagliery, Felipe (March 30, 2015). "Fidel Jr. Back in the News". Havana Times.
  12. "Se suicida Fidel Castro Díaz-Balart, hijo mayor del expresidente de Cuba". BBC Mundo. 2 February 2018.
  13. Executive Office of the President, Latin America Report (1983), Issue 2696, p. 2.
  14. 14.0 14.1 French, Howard W. (September 7, 1992). "Cuba Cancels Atom Plant, Blaming Costs and Russians". The New York Times.
  15. "Falleció el compañero Fidel Castro Díaz–Balart". Granma. 1 February 2018.
  16. "Fidel Castro's eldest son 'Fidelito' commits suicide". Reuters. 1 February 2018.
  17. "Fidel Castro's Eldest Son Commits Suicide". Shillong Times. February 2, 2018.
  18. Elfrink, Tim (September 20, 2012). "Fidel Castro Is Not Senile, Still "Working Hard," His Son Says". Miami New Times.
  19. Gibbs, Stephen (February 16, 2007). "Cuba's Castro recovering says son". BBC.
  20. Allen, Nick (March 1, 2015). "Cuba's revolution comes full circle with a Hilton in Havana". The Telegraph.
  21. Zhao, Helen (February 28, 2015). "Paris Hilton parties with son of former Cuban leader Fidel Castro and Naomi Campbell at cigar festival in Havana". Daily Mail.
  22. Madan, Monique O.; Flechas, Joey (2 February 2018). "Fidel Castro's oldest son commits suicide after battle with depression". Miami Herald.
  23. "Cuba: Fidel Castro's son 'takes own life'". BBC News. 1 February 2018.
  24. Oppmann, Patrick (1 February 2018). "Fidel Castro's eldest son takes own life, state media reports". CNN. Retrieved 2 February 2018.
  25. "Fidel Castro's eldest son dies aged 68 – reports". The Guardian. 2 February 2018. Retrieved 2 February 2018.
  26. White, Jeremy (2 February 2018). "Fidel Castro's eldest son has died". The Independent. Retrieved 2 February 2018.
  27. Rodriguez, Andrea (February 2, 2018). "Fidel Castro's son mourned in Cuba after suicide". ABC News.

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