There are so little evidences of what lives were during the prehistoric era. Most of our sources come from the biological and archaeological evidences gathered by different people. However, it is quite clear that the lives of people before were entirely depending on thinking that good is rewarded by a heavenly entity. This is very different from the laws today because of our aim to be more logical in decision making, etc.
During the Cold War, the U.S & the Soviet Union fought together as allies against the Axis. But the relationship wasn't exactly comfortable. Americans were aware of about the Russian leader.
Both sides were "afraid" fighting each other directly.
