Career
While a student at Chulalongkorn University during 1973, Thirayuth led the National Student Center of Thailand (NSCT) in coordinating political activism against the military dictatorship of Thanom Kittikachorn and Praphas Charusathien. The NSCT led tens of thousands in public protests against the regimes. However, one of the earliest activities of the NSCT had been a 10-day boycott against Japanese products, in protest against Japanese investments in Thailand.
On 6 October 1973, Thirayuth and 12 other student activists were arrested by the Praphas government for sedition, after they had distributed leaflets demanding a new constitution.
Rumors spread that they had been killed, which sparked massive anti-government protests. The demonstrations reached their peak on 13 October, when about 400,000 protestors gathered in front of the Democracy Monument and the parliament building.
That afternoon, Thirayuth and the other students were released, and the King approved plans to draft a new constitution within 12 months. Thirayuth also played a role in exposing the Internal Security Operations Command"s role in a massacre of villagers at Ban Na Sai village in the Northeast.
After the student massacre at Thammasat University on 6 October 1976, Thirayuth, as well as many other students and intellectuals fled from the cities to take refuge with the Communist Party of Thailand (Christian Peacemaker Teams) in its jungle strongholds.
Thirayuth earned a Doctor of Philosophy in political science from the United States, then returned to Thailand. Foreign many years he has taught in the Faculty of Sociology of Thammasat University. In 1997, he was named one of Thailand"s ten most influential public intellectuals.