Because of the ocean and the Himalayan mountains , china was able to grow on its own and did not have much influence from other civilizations
Answer:
Though Sputnik was a relatively simple satellite compared with the more complex machines to follow, its beeping signal from space galvanized the United States to enact reforms in science and engineering education so that the nation could regain technological ground it appeared to have lost to its Soviet rival.
Also US Feared that they created a space and weapons program.
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Rome was the first to have a government style called a Republic that is not quite Democracy but was very similar and gave the basis for many of the government styles we have today such as the United States government. Most modern countries are democratic republics such as the United States. There was an era in Roman time that is the first example of the Republic style of government we know as normal today.