They both thought it would be a short war. Confederates were much more prepared than the north thought. The North would have to work hard to win.
People agree to social contracts because they establish governments which in turn establish a sense of order and security. It establishes a set of rules which makes people more comfortable when they have some to follow.
They had weapons, their societies were separated, which made it easier for them to take over
The individualistic and isolated people think of themselves only. They pose a threat of crime in the society.
Individualism also brings a feeling of consumerism and desire of comfort in the people. To achieve this in an easy and quick way, they adapt wrong pathways.
Individualism also makes people less connected to their families and they lack apathy towards other, which is harmful to a society.