The people of Athens were allowed citizenship if they possess a helpful craft that is useful to the city.
Port-au-prince, a city in haiti with magnitude7.0
It is very much hard to answer.
It was mainly because of how the North and the South of America had different lifestyles and economy's. You would be surprised to know that the Democratic party back then supported Slavery and the republicans dint support Slavery.
Plain Answer: Because of Slavery, Way of Life and Different Economy. The Democratic Party would do anything to keep themselves supported.