Kim Philby
Senior British Intelligence Officer / KGB Agent
"To betray, you must first belong."
Biography
Harold Adrian Russell 'Kim' Philby was the most consequential spy of the twentieth century — a senior British intelligence officer who, while appearing to be one of the West's most valued assets, was passing every secret he learned to Moscow. Recruited at Cambridge University by Soviet intelligence in 1934, Philby joined MI6 and rose to become head of its anti-Soviet section — the very department tasked with countering Soviet espionage. As a member of the Cambridge Five spy ring, he betrayed dozens of intelligence operations, caused the deaths of hundreds of agents, and gave the Soviets advance warning of every major Western intelligence initiative for two decades. When his cover was finally broken in 1963, he defected to Moscow, where he lived as a KGB general until his death in 1988 — an honored hero of Soviet intelligence.
Did you know?
Philby was briefly head of MI6's Washington liaison office, meaning he had access to virtually all U.S.-UK intelligence sharing in the early Cold War — including early CIA operations. When he defected in 1963, CIA counterintelligence chief James Angleton, who had considered Philby a close friend, was so traumatized that he spent the next decade hunting phantom Soviet moles, paralyzing the CIA's Soviet operations.
Life Journey
Timeline
January 1, 1912
🌅 Birth
Born in Ambala, British India
1929–1933
📚 Education
Trinity College, Cambridge — recruited by Soviet intelligence
1940–1963
📍 Posting
MI6 officer — rising to head of anti-Soviet section
1949–1951
📍 Posting
MI6 liaison to CIA in Washington — passed secrets to KGB
January 1963
🕊️ Postwar
Defected from Beirut to the Soviet Union
May 11, 1988
✝️ Death
Died in Moscow, honored KGB general