Industrialization in the north caused

Industrialization in the north caused middle class to emerge. The Industrial Revolution took place from the 18th to 19th centuries. It offered new manufacturing processes, new forms of production and new scales of production. Middle class was a consequence of the Industrial Revolution. The
investments and the power was not more held by the nobility and the Church, but it was more flexible and the middle class emerged.

The re-election of the president abraham lincoln.