There were many factors that allowed the Byzantine Empire to last a 1000 years after the end of the Roman Empire which include the fact that Constantinople, the capital of the Byzantine Empire, was protected with walls that lasted almost the entire 1000 years, making Constantinople, and the center of the empire's economy/culture impervious to invaders.
Answer:
Stalin helped Lenin to evade capture by authorities and ordered the besieged Bolsheviks to surrender to avoid a bloodbath.
Explanation:
In the years following Lenin's death in 1924, he rose to become the authoritarian leader of the Soviet Union.
The Einstein–Szilárd letter was a letter<span> written by </span>Leó Szilárd<span> and signed by </span>Albert Einstein<span> that was sent to the </span>United States President Franklin D. Roosevelt<span> on August 2, 1939. Written by Szilárd in consultation with fellow </span>Hungarian<span> physicists </span>Edward Teller<span> and </span>Eugene Wigner<span>, the letter warned that Germany might develop </span>atomic bombs<span> and suggested that the United States should start its own nuclear program. It prompted action by Roosevelt, which eventually resulted in the </span>Manhattan Project<span>developing the first atomic bombs.</span>
I'm not sure if this is what you're looking for but a president should have a strong vision for the country's future, an ability to put their own times in the perspective of history, effective communication skills, the courage to make unpopular decisions, crisis management skills, character and integrity.
