What cause the civil war?

Answer 1

There are hundreds of countries in the world today. Each has had at least one civil war. Many have had several throughout the ages. Almost every war had a unique cause, although based on a few common factors.

Hence, listing the cause of every civil war that ever happened is something not possible in a single answer; many class courses could not cover every one in a single year.

Please ask again, and specify the country (and year, if applicable) of the war you wish to know about.

Answer 2

The separation of the union and by the slavery

Lincoln's election, growing tension, and the attack on Fort Sumter.