Answer: President Truman
During the early days of the Korean War, McArthur had proven to be an excellent leader with brilliant strategies. However, he decided to invade North Korea in order to fully defeat the communists. Truman accepted, although he was worried about a Chinese intervention. McCarthy assured him this was very unlikely. However, the Chinese did intervene, and when McArthur asked for permission to attack China, Truman refused. The conflict was well-known, and resulted in Truman relieving General McArthur of his duties in Korea.
An economic downturn.
http://factsanddetails.com/russia/History/sub9_1f/entry-4990.html
The Soviet Union turned a rural, agrarian society into one of the largest economic powerhouses in the world. The breakup greatly effected it.
Repetition, endurance, and rhythm
Answer:
World War II changed the lives of women and men in many ways. ... Most women labored in the clerical and service sectors where women had worked for decades, but the wartime economy created job opportunities for women in heavy industry and wartime production plants that had traditionally belonged to men.
Answer : The social class mainly belonged to peasant class or the working class and they contributed crops and other things.
Explanation : In early civilizations, the peasant class or working class were the largest social class by majority number of people. These people majorly worked in agriculture and grew the food and crops needed to sustain and feed the society. So, these were the only contributions they gave to early civilizations.