This document discusses several important Filipino thinkers from the 19th-21st centuries who contributed to social sciences in the Philippines. It describes Jose Rizal, Andres Bonifacio, Apolinario Mabini, Virgilio Enriquez, and Zeus Salazar. Rizal advocated for intellectual revolution through his novels. Bonifacio founded the Katipunan secret society. Mabini was known as the "Brains of the Revolution." Enriquez established Sikolohiyang Pilipino, or indigenous Filipino psychology. Salazar developed the concept of "pantayong pananaw," arguing that Philippine history should be written from the Filipino perspective in local languages.