This may is very revealing. Some Freepers have noted the growing differences between the people who polulate these states.
Not being alive in 1859-ish America, I don't know how people in the country felt. But, if there was a way to qualitate and quantitate “the mood” of those folks and compared it to what's out there today, I'd speculate the results would be very, very similar. And we know what started in 1861.