Who banned chinese immigration to the us for a total of 40 years; after the completion of the transcontinental railroad many in the united states viewed the chinese as a threat to american jobs and culture?

Was the us justified in using the atomic bomb on hiroshima and nagasaki? why or why not?

In order to get a consensus between anti-federalists and federalist to be able to forward on the constitution, james madison advocated for a bill of rights. what was the purpose of the bill of rights for citizens of the united states?

How did the supreme court decision in the slaughterhouse cause an affect american business