Pick a war, most any war, and you can usually say the same. But the "arrogance and pride" have roots, and while I am not a default Economic Determinist', it is foolish not to look to economic roots for causes.
King Cotton, and the wealth it created, on the back of slave labor, is without a question the economic engine that drove the regions apart.
When I teach my students, I tell them that the war was caused by MANY things. Sectional differences, economic factors, and the fundemental issue of the Rights of States vs the Federal Government, the chief issue within THAT issue being slavery.