Agoncillo belonged to the "Pantayong Pananaw" (for-us perspective) school of thought before it was formally named. He rejected the "colonial" historiography that viewed Philippine history through Spanish or American lenses. Where previous historians focused on Spanish governors and American benevolence, Agoncillo shifted the spotlight to the inang bayan (mother country) and the anonymous Filipino masses.
Agoncillo's academic career spanned several decades, during which he taught at various institutions, including the University of the Philippines, Ateneo de Manila University, and De La Salle University. His expertise in Philippine history, culture, and society led to his appointment as a consultant to the Philippine government on various projects, including the development of the country's historical and cultural heritage programs. history of the filipino people teodoro a agoncillo pdf 2021
History of the Filipino People and Martial Law - Archium Ateneo Agoncillo's academic career spanned several decades