After retirement from the Army, Hester studied at University of North Carolina at Chapel Hill,
University of Pennsylvania, and
George Washington University, in the areas of law and international relations, but did not earn a degree. Hester was an outspoken opponent of U.S. foreign policy for the remainder of his life. In the summer of 1957, he took a 12,000 mile trip through the
Soviet Union. He met with
Nikita Kruschev and advocated for peace in
letters to the
New York Times multiple time. In 1959, he published a book, "On the Brink", with sociologist
Jerome Davis. It expressed concerns about the
Cold War and suggested that new U.S. policies were needed. Hester was a common speaker at peace rallies in the 1960s and authored many opinion and editorial pieces. He was a special correspondent for
The Nation, The Churchman, and U.S. Farm News, as well as a speaker on the lecture circuit. General Hester was designated the honorary commander of a
Vietnam Veterans Against the War protest march in 1970. He became involved in the
Fair Play for Cuba Committee. Hester opposed the
Vietnam War and supported the
Vietnam Veterans Against the War organization. In 1971, he published "Twenty-Six Disastrous Years" which criticized U.S. foreign policy. Hester argued for disarmament, weapons control, and world government. He was one of the signatories of the agreement to convene a convention for drafting a
world constitution. As a result, for the first time in human history, a
World Constituent Assembly convened to draft and adopt the
Constitution for the Federation of Earth. ==Personal life==