Which area was not in contention between north and south?

abolition of slavery
application of tariffs
representation in congress
early history of united states

following type of cultural development caused people to want and buy new products on the market :

yes

explanation:

the fighting words doctrine, in united states constitutional law, is a limitation to freedom of speech as protected by the first amendment to the united states constitution. in 1942, the u.s. supreme court established the doctrine by a 9–0 decision in chaplinsky v. new hampshire.