CIA Founded
The Central Intelligence Agency was created in 1947 when the United States passed the National Security Act, establishing a permanent civilian organization to gather and analyze foreign intelligence. It became one of the most influential and controversial institutions of the Cold War, shaping American foreign policy and, at times, the politics of other nations.
The roots of the agency lay in the Second World War. The United States had relied on a patchwork of military and diplomatic intelligence units, and the surprise attack on Pearl Harbor in 1941 was widely seen as a failure to connect available information. In response, President Franklin Roosevelt created the Office of Strategic Services in 1942, which carried out espionage, analysis, and sabotage behind enemy lines. President Harry Truman disbanded the OSS in late 1945, but the growing rivalry with the Soviet Union soon convinced many officials that a peacetime intelligence service was needed. Truman briefly set up a smaller body, the Central Intelligence Group, in 1946.
The National Security Act of 1947 went further. Besides creating the CIA, it established the National Security Council, merged the military departments under a National Military Establishment (later the Department of Defense), and created the U.S. Air Force as a separate service. The CIA was to advise the National Security Council, coordinate intelligence, and analyze information from across the government. The law did not explicitly mention covert action, but it allowed the agency to perform "other functions and duties" as directed. Within a short time, the NSC authorized secret operations, and the agency began to take on that role.
During the early Cold War, the CIA supported anti-communist political groups in Western Europe, ran propaganda efforts, and developed new technologies such as high-altitude reconnaissance aircraft and, later, satellites. It also became associated with efforts to influence or overthrow foreign governments. Operations in Iran in 1953 and Guatemala in 1954 are among the best-known examples, and the failed Bay of Pigs invasion of Cuba in 1961 was a notable embarrassment. Historians continue to debate how effective and how justified these actions were.
The agency's reputation was reshaped in the 1970s, when congressional investigations, including the Church Committee, revealed domestic surveillance and attempts at assassination plots abroad. These findings led to stronger congressional oversight. The CIA's role changed again after the September 11 attacks in 2001 and the intelligence reforms that followed, including the creation of the Director of National Intelligence in 2005. Today the CIA remains central to American national security, and its history is still a subject of debate over secrecy, accountability, and democratic government.