Answer:
Augustus brought peace (“Pax Romana”) to the Greco-Roman world. In 27 BCE he nominally restored the republic of Rome and instituted a series of constitutional and financial reforms that culminated in the birth of the principate. As princeps of Rome, Augustus enjoyed enormous popularity.
<span>It caused widespread unemployment in Germany, but not in the Soviet Union. </span>
<span>Civil War and Postwar Amendment</span>
Germany's growing power and Britain's desperate need is the correct answer.
The US initially tried to remain neutral during World War II owning to large causalities in World War I. But The Germany's growing power and Britain's desperate need made it increasingly difficult for President Roosevelt to stay neutral. The Germany under Hitler was gaining more and more control in Europe which was being effectively helped by Soviet Union and on the other hand the fall of France had made Britain alone to fight the Axis. So it made difficult for Roosevelt to remain neutral during the World War II.
"<span>a new era of Western imperialism" is not something that is greatly a </span>consequence of ethnic rivalries in African nations, while the rise of dictators has definitely taken place.