Although there were only a few Northerners who opposed slavery , the question was whether it should be allowed in the newly acquired Western territories (part of California , New Mexico and Utah . The Northerners who opposed slavery did not want to compete against slave labor . Furthermore , historians traced the other reasons of the Civil War to be difficulties over the imposition of tariff and other territorial issues , and the growing conflicts about different things . Before 1793 , the Southerners were producing tobacco...











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