What was the underlying cause of the Cold War?

Who is vaspasian? How many centuries are in one thousand years? Who was Macheveilli? Was the period between the fall of Rome and the Renaissance a dark age? What year is XIXth Century? Where did 400 years of slavery come from? Why did the Christians and the Muslims hate each other in the third crusades? What are the Explorations in chronological order? When was Charlemagne so great? What was the port of rome called and how did the incoming goods get from the port to the city itself? What were the earliest nations to assume some form of power as the feudal system of Europe declined? Why where men only allowed on stage in shakespearean times? How did renaissance change the medieval view on life? What problems did explorers face when moving west? What were the successes and failures for the Celts? What is a ceremony where men become vassals in a lord's manor? What color were the shoes of the wicked witch of the west? The first organized opposition to slavery as an institution emerged late what century? When did modern technology begin in a certain time? What brought the czarist monachary to collapse?