After the election of Abraham Lincoln in 1860, why did the Southern states secede from the Union?

Question

Quizplus · Accepted Answer

The Southern states seceded from the Union after the election of Abraham Lincoln in 1860 in order to preserve the institution of slavery.
Key Takeaway: After Abraham Lincoln was elected in 1860, they knew they either had to expand West or otherwise they would become a minority in both the Senate and the House or Representatives, which may threaten the institution of slavery in the South. The South knew that the immediately-needed expansion was not a possibility, so secession was necessary to preserve slavery.

After the Election of Abraham Lincoln in 1860, Why Did