One cause of the unparalleled material abundance of the United States in the 1950s is the population where in the population likely increase for about thirty million-- contributing to the unparalleled material abundance in the United States during the 1950s.
Answer:
The Soviet union occupied the north and the united states occupied the south
Answer: Because Truman asked Stalin for assistance with Japan and Stalin said america did not need the USSR's help.
Move the Native Americans to reservations, thus making room for the influx of white settlers.