Tadeo was born in
Bocaue,
Bulacan. He obtained a bachelor's degree in Agriculture from
Araneta University in 1960 and worked in various government agencies from 1962 to 1981. Shortly after the fall of the
Marcos dictatorship, Tadeo was appointed to be part of the
1986 Constitutional Commission where he was the sole peasant representative. According to Tadeo, most of the 13 were part of a "composite team" purposely put to protect him from gunfire. Asked about his views on the president, he remarked that she "[was] running the country like her own
hacienda," and retorted "I asked Cory Aquino for land for the peasants and she gave me 'Muntinlupa' (in
Tagalog, 'tiny piece of land')." Tadeo, along with other peasant activists, split from the KMP to form Demokratikong Kilusang Magbubukid ng Pilipinas (DKMP) during the height of
ideological disagreements within the national democratic movement in 1993. In his later years, Tadeo led Paragos-Pilipinas, a small group of
Bulakenyo and
Central Luzon farmers. He supported the Genuine Agrarian Reform Bill (GARB) filed in Congress by Rep.
Rafael Mariano, a former KMP colleague, in 2018. == Death and legacy ==