Who is the most successful spy ever?
Could you please elaborate on the criteria for evaluating the success of a spy? When we discuss the most successful spy ever, are we considering their impact on global affairs, the number of missions successfully completed, or their overall influence on intelligence operations? Also, how do we factor in the secrecy surrounding the spy's identity and achievements? Could you provide some examples of spies who might fit this description, and explain why they stand out as the most successful? Finally, are there any modern-day spies who could potentially rival or even surpass the achievements of past spies?