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Teodoro Andal Agoncillo (November 9, 1912 – January 14, 1985) was a 20th-century Filipino historian. He and his contemporary Renato Constantino were among the first Filipino historians renowned for promoting a distinctly nationalist point of view of Filipino history (nationalist historiography). He was also an essayist and a poet.
He was named National Scientist of the Philippines in 1985 for his distinguished contributions in the field of history. Agoncillo was also among the few academics who held the rank of University Professor, an academic rank given to outstanding faculty members with specialization in more than one of the traditional academic domains (Science & Technology; Social Sciences; and Arts & Humanities), at the University of the Philippines Diliman.
Born in Lemery, Batangas, Agoncillo obtained a bachelor's degree in philosophy from the University of the Philippines in 1934 and a master's degree in the arts from the same university the following year. He earned his living as a linguistic assistant at the Institute of National Language and as an instructor at the Far Eastern University and the Manuel L. Quezon University. In 1956, he published his seminal work, Revolt of the Masses: The Story of Bonifacio and the Katipunan, a history of the 1896 Katipunan-led revolt against Spanish rule and its leader, Andres Bonifacio. He garnered acclaim for this book, as well as criticisms from more conservative historians discomfited by the work's nationalist bent.
In 1958, Agoncillo was invited to join the faculty of the Department of History of his alma mater, the University of the Philippines. He remained with the university until his retirement in 1977, chairing the Department of History from 1963 to 1969. Philippine President Diosdado Macapagal named Agoncillo as a member of the National Historical Institute in 1963. He served in this capacity until his death in 1985.
Agoncillo's History of the Filipino People, first published in 1960, remains a popular standard textbook in many Filipino universities, as are many of Agoncillo's other works. This is despite Agoncillo's controversial tone and for his perceived leftist bent. Gregorio Zaide, Teodoro Agoncillo, Reynaldo Ileto and Renato Constantino stand as the most prominent 20th-century Filipino historians to emerge during the post-war period. However, opponents of Agoncillo contend that Agoncillo's works suffer from uneven scholarship throughout, especially with his use (or especially, non-use) of reliable historical sources, even when his opponents could not offer solid rebuttals.
- The Revolt of the Masses - (a biography of Andres Bonifacio)
- Malolos Crisis of the Republic - (sequel to Revolt of the Masses which discusses the events from Biak-na-Bato to the end of the Philippine-American War)
- The Fateful Years - (Philippine history during World War II)
- The History of the Filipino People
- Filipinos in History: Volume III, National Historical Institute (Manila, 1996), pp. 6-7.
Talking History: Conversations with Teodoro Andal Agoncillo, Ambeth R. Ocampo, De La Salle University Press, 1995