Pactomania is a term used to describe a period of treaty making by the United States during the Cold War. During the Presidency of Dwight D. Eisenhower, the United States, mainly through the efforts of Secretary of State John Foster Dulles, formed alliances with 42 separate nations along with treaty relations with nearly 100, which observers described as "pactomania". In more recent years, the term came to be used to refer to that historical period.

John Foster Dulles (February 25, 1888 – May 24, 1959) served as U.S. Secretary of State under President Dwight D. Eisenhower from 1953 to 1959. He was a significant figure in the early Cold War era, advocating an aggressive stance against communism throughout the world. He advocated support of the French in their war against the Viet Minh in Indochina and it is widely believed that he refused to shake the hand of Zhou Enlai at the Geneva Conference in 1954. He also played a major role in the Central Intelligence Agency operation to overthrow the democratic Mossadegh government of Iran in 1953 (Operation Ajax) and the democratic Arbenz government of Guatemala in 1954 (Operation PBSUCCESS).

Born in Washington, D.C., he was one of five children and the eldest son born to Presbyterian minister Allen Macy Dulles and his wife Edith (Foster). His paternal grandfather, John Welsh Dulles, had been a Presbyterian missionary in India. He attended public schools in Watertown, New York. After graduating from Princeton University (Phi Beta Kappa, 1908), where he competed on the American Whig-Cliosophic Society debate team, and graduating from The George Washington University Law School, he joined the New York City law firm of Sullivan & Cromwell, where he specialized in international law. He tried to join the United States Army during World War I but was rejected because of poor eyesight. Instead, Dulles received an Army commission as Major on the War Industries Board.