It was Lenin.
It cannot be Stalin, because Lenin is his predecessor and it is with Lenin that the central planning and communism was introduced to what was then Russia.
Karl Marx and Engels created together communism, but didn't introduce it specifically to Russia. They wrote their ideas and they spread all around the world and Lenin was inspired by them.
Equal forces and no use of nuclear weapons.
After the initial invasion of the South by the North, UN forces under US leadership were able to push back forces into the North. However, China then entered the war creating a surge back toward the 38th parallel. With the US unwilling to use an atomic weapon, the countries were evenly matched and no one was able to make traction.
I would go with the first one
The Romans had historians. This meaning the Roman legacy went on in Europe for centuries, even long after the fall of the Roman Empire. The Incas had no writing that I know of but maybe it just was not deciphered. They were conquered by the Spanish (because they had better weapons such as guns).This meant much of their history was lost when the Spanish conquered the area. Hope this helps and please give brainliest it would help me reach expert ;)
Answer would be the indulgences. they were used as "get out of jail free" cards when it came to sinning, this lead to the lutheran reform later down the road.
Hope this helps, please mark brainliest!!