The immigration and
the Naturalization Act abolished the earlier quota system that was based on
national origin as well as the establishment of new immigration policies that
was based on reuniting immigrant families and also attracting the skilled labor
to the United States. The policies that were put in place were going to change
the demographic makeup of the American population since the immigrants that
were entering America under the new legislation n Asia, Africa as well as the
Latin America.
A: The Civil War
Assuming that you're talking about the American (U.S) civil war, that is.
The civil war was a conflict between the rights of the (slave owning) states and the national government. A war about state rights.
The war of 1812 was between 2 independent, sovereign nations.
The great depression was just an economic thing.
The northwest ordnance, I have the least knowledge of, but it still wasn't between states and the national government.
Hope this helps.
Another name would be B. Revisionist