How did cotton affect the northern economy during the civil war?

The Civil War greatly improved the economy of the North but harmed the economy of the South. The Civil War disrupted the Southern economy badly.  Destruction of things like railroad tracks caused short-term damage to the South's economy. Meanwhile, the Northern economy was helped by the war.

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c holding free elections

i think it was because of how protected egyptian civilization was was which allowed them to evolve without much outside influence.