Dr. Corpuz was later named Minister of Education under the parliamentary system wherein he was also member of the now defunct Batasang Pambansa (National Assembly) from 1979 to 1983.

[3] In 2004, he was named National Scientist of the Philippines for his contributions to Filipino scholarship particularly in areas of economics, history, political science, and public administration.

He later finished a Master of Public Administration (MPA) degree in 1955 and a PhD in Political Economy and Government in 1956 from Harvard University.

Corpuz later ran for a position and won in the Batasang Pambansa, the legislative body of the parliamentary Philippines during the Marcos Sr. dictatorship.

The economist reentered government as member of the board of the National Historical Institute in 1987 during the time of former President Corazon C. Aquino.

His previous research formed the basis for his best-known published works, which include: The Philippines (1965; Prentice-Hall); Roots of the Filipino Nation 2 vols.