title: World Book Encyclopedia | Atlas | Homework Help
description: A Divided Nation: Causes of the U.S. Civil War--World Book Encyclopedia examines the causes of the U.S. Civil War, including the conflict over slavery, the abolition movement, Abraham Lincoln's election as president, and the secession of southern states.
description: What were the top five causes of the Civil War? The roots of the civil war were already there when the United States was first forming. Here is a detailed look at the five major causes of the Civil War.