Which were more successful during the cold war CIA or KGB?

The success of the CIA and KGB during the Cold War can be viewed through different lenses, depending on the criteria used. The KGB was highly effective in domestic surveillance and maintaining control within the Eastern Bloc, while also successfully influencing global communist movements. Conversely, the CIA achieved notable successes in espionage, covert operations, and fostering anti-communist regimes, particularly in Latin America and the Middle East. Ultimately, the effectiveness of each agency varied based on specific operations and geopolitical contexts.