The shortest lived known head of state is Jean I of France who ruled and lived for five days in 1316.
Answer:
The Soviet Union and the U.S. were primarily responsible for the Cold War because they were the two biggest superpowers of their respective government and economic types. The United States was the best Capitalistic and Democratic country, while the Soviet Union was a Communist government. This led to proxy wars between the two, most notably the Vietnam War.
They had no real power or authority to enforce their laws, taxes, and/or polices.
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