born on 26 February, 1952, in Lemery, Batangas and died on 28 October, 1989, in his laboratory, Manila. He graduated from the Faculty of Philosophy of the University of the Philippines with a Bachelor of Arts degree in Filipino Language and Literature in 1973, and graduated from the Correspondence School of Arts and Letters with a Master in the Arts degree in 1978.
Born in Lemery, Batangas to Pedro Agoncillo and Feliza Andal, both from landed families in Batangas, Agoncillo obtained a bachelor's degree in philosophy from the University of the Philippines in Manila, 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. d2c66b5586