Affairs from June 18, 1957 until August 27, 1960. Pursuing the Eisenhower Administration's Cold War policy of containment (as expressed in the Eisenhower Doctrine), Rubottom's chief aim as Assistant Secretary was to halt the spread of Communism in Latin America. In January 1958, Rubottom gave an important speech entitled "Communism in the Americas" in which he warned that agents of the Soviet Union were increasingly active in Latin America and that the U.S. needed to be prepared to support anti-Communist forces in Latin America. The Cuban Revolution of 1959 occurred while Rubottom was Assistant Secretary. Rubottom initially believed that Castro was not a Communist, and in April 1959, the State Department greeted Castro as a "distinguished leader". At a January 14, 1960 meeting of the United States National Security Council, Rubottom explained how the State Department's policy evolved from having a positive image of Fidel Castro in early 1959 through to deciding Castro needed to be assassinated by the end of the year: In addition to discussions about assassinating Castro, Rubottom was involved in discussions about the United States embargo against Cuba, which began in October 1960, two months after Rubottom left the State Department. As Assistant Secretary, Rubottom was supportive of moderates in the Dominican Republic who sought the overthrow of dictator Rafael Trujillo, advising the National Security Council in March 1960 that an assassination attempt would occur soon. He was in contact with CIA officials about orchestrating the assassination, which eventually occurred in May 1961. Later years (1960–present) President Eisenhower then nominated Rubottom as United States Ambassador to Argentina; Ambassador Rubottom presented his credentials to the Argentinian government on October 20, 1960 and served in that post for one year, leaving Argentina on October 19, 1961. Rubottom spent 1961–64 as a faculty adviser at the Naval War College. He then returned to his alma mater, Southern Methodist University, as Vice President of Life (1964–67); Vice President of Administration (1967–70); and Vice President of Planning (1970–71). He then spent two years as president of the University of the Americas before retiring in 1973. In retirement, Rubottom lived in Dallas. Rubottom and his wife were active members of the Highland Park United Methodist Church. Rubottom was also active in the Boy Scouts of America, serving as U.S. delegate to the World Scout Conference on four occasions and being awarded the Silver Buffalo Award in 1993. Rubottom also remained active in