Answer:
In no way would it have been possible to prevent World War II. Western powers, especially Britain and France, attempted to carry out appeasement policies against the imperialist actions of Germany in Austria and the Czech Republic. The United States, on the other hand, was carrying out an isolationist policy, with which it hardly intervened in the moment before the war.
In any case, no alternative could have worked in the face of Adolf Hitler's imperialist impetus, who wanted to create a predominant German empire throughout Europe. Nor could the expansionist thirst of Italy, whose leader Benito Mussolini sought to control the Mediterranean and regain a position of power after World War I, could have been quenched. Furthermore, the Empire of Japan was in the same position as its two allies. All this created a warlike breeding ground, which in no way could be restrained peacefully without huge losses on the part of Western countries.
Answer:
A divided regional identity (with a bit of national unity) developed.
Explanation:
Politics: Some contributed (voting rights) to unity, others (nullification) clearly divided the country.
Economics: Market revolution was a bit of both but Tariffs and the clash between the industrial north and the agricultural south was dividing the country and contributed to a regional identity.
Foreign Policy: The war of 1812 united the country; the westward expansion was uniting and dividing at the same time.
As we take in account that Economics is always the most important thing for the general public, the regional identity grew more than the national unity did.