McGeorge "Mac" Bundy (March 30, 1919 – September 16, 1996) was an American academic who served as United States National Security Advisor to Presidents John F. Kennedy and Lyndon B. Johnson from 1961 through 1966. He was president of the Ford Foundation from 1966 through 1979. Despite his career as a foreign-policy intellectual, educator, and philanthropist, he is best remembered as one of the chief architects of the United States' escalation of the Vietnam War during the Kennedy and Johnson administrations.