What effect did espionage have on the USSR during the cold war?

Espionage during the Cold War had a profound impact on the USSR, influencing both its foreign and domestic policies. The intelligence gathered through espionage allowed the Soviet Union to anticipate and counter Western strategies, but it also led to paranoia and mistrust within its own ranks, fostering an environment of suspicion. High-profile spy cases, such as those involving double agents, often resulted in political purges and a tightening of control over dissidents. Ultimately, the intense focus on espionage diverted resources and attention from pressing economic and social issues, contributing to the USSR's eventual decline.