Matching Pairs What were causes of the Civil War?Online version Relate the causes with their corresponding explanation to understand the birth of the Civil War. by Norma García 1 Abraham Lincoln 2 Rights in the States 3 Uncle Tom's Cabin 4 Abolitionist Movement 5 The Underground Railway 6 The Dred Scott Decision 7 Slavery A slave looking for citizenship legally in the Supreme Court whose request was denied since no person with African blood could become a U.S. citizen. By the early 1830s, ideas became more strident. People were following a higher law not the Constitution. Freedom, not being a fugitive was the aim. Opponent of the expansion of slavery but said he would not interfere with it where it existed until he became president and slavery was banned. Some abolitionists actively helped runaway slaves to escape through this path. A book published in 1852, became a best seller representing the evils of slavery. Even when slavery was forbidden by the federal government some States refused, there was a struggle over political power. Some 4 million Africans and their descendants were slave laborers in the South mainly in plantations.