 In 1952, Tueni was appointed by the SSNP leadership to represent the party in the Popular Socialist Front led by Kamal Jumblatt that forced the resignation of Lebanese president Bechara El Khoury

Tueni studied at the International College (IC) and then, at the American University of Beirut under Charles Malik who was influential in the development of his thoughts.He received a bachelor of arts degree in philosophy from AUB in 1945.He then went to the United States to study at Harvard University where he received his master's degree in government.