Why United States right to spy on the Soviets during the Cold War?

Explanation:

U.S. spies for the Soviet Union in the early days of the Cold War were generally motivated by ideology, whereas in the 1980s and 1990s they were generally motivated by personal gain. After the collapse of the Soviet Union, most U.S.-Russian spying was for security purposes.

c, they united with once

according to worldatlas.com, the u.s. has an 86% literacy rate.