In Spies We Trust: the story of western intelligence by Rhodri Jeffreys-Jones
[PDF file]: […] well as betrayed by their friends, and misled, even turned against, their own democracies. In their favour, signals intelligence probably shortened the Second World War, and covert propaganda may have helped bring down the Soviet Union (Jeffreys-Jones doesn’t seem certain about this). The record is mixed, but it is far from reassuring. Hence the […]