<span>By gradually building up the sea power of the US Navy.</span>
Answer:
New constitutions ended many social distinctions and abolished slavery.
<span>It was a policy for isolationism. At that time, many Americans were still
recovering from the losses they incurred in World War I. Apart from that they had to deal with an
economic depression that left many unemployed and in poverty. Later as Germany began a massive military
campaign in Europe, the U.S. began to worry about the aggression of the Germans
and later gave aid to the British and French governments in the form of money
and arms. When the Japanese attacked
Pearl Harbor, the U.S. formally entered the Second World War.</span>
It caused more jobs to open up
