Election of 1860, in which Lincoln won with no electoral votes in the South is one of the most significant differences.
While the southern identity was developed by the notion that the concept of slavery was the key to economic development, the northern identity was shaped by ideals of free labor and a desire for free soil (no slavery).
Northern identity was shaped by a desire to preserve the Union, whilst Southern identity was shaped by the notion that the north aimed to destroy their way of life.
Both the North and the South supported growth, although for various causes. While the south sought expansion to give more space for plantation agriculture and enslaved labor, the north wanted it to give more area for free white farmers and laborers.
Both the north and south desired to increase the number of free or slave states in order to increase their representation in Congress. At the very least, all parties desired to keep the two regions' power relations in balance.
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