Cambridge Spies

In the grand sweep of 20th-century history, the West ultimately emerged victorious in the Cold War, yet this triumph was not without its significant and often stinging defeats. Among the most spectacular and embarrassing of these setbacks was the defection of Kim Philby, a man who held the position of head of the British MI5 section dedicated to counterintelligence against the Soviets, only to be revealed as a deep-…