Answer:
1. The Kansas-Nebraska Act did not create new states. Instead, it organized the territories of Kansas and Nebraska and allowed them to decide whether to allow slavery through popular sovereignty.
2. Dred Scott ended up in a free state when his owner took him to live in Illinois (a free state) and then later to the Wisconsin Territory (also free according to the Missouri Compromise). However, the Supreme Court's decision in the case of Dred Scott v. Sandford (1857) was that African Americans, whether enslaved or free, could not be considered American citizens and therefore could not sue in federal court. Additionally, the Court ruled that Congress did not have the power to prohibit slavery in the territories, effectively declaring the Missouri Compromise unconstitutional.
3. Abolitionist John Brown fought against slavery through direct actions, including:
- The Pottawatomie massacre in 1856, where he and his followers killed several pro-slavery settlers in Kansas.
- The raid on Harpers Ferry in 1859, during which Brown and his supporters attempted to seize a federal arsenal to arm a slave rebellion. The raid was unsuccessful, and Brown was captured and later executed.
4. After Abraham Lincoln was elected president in 1860, the southern states responded by seceding from the Union. The first state to secede was South Carolina in December 1860, followed by Mississippi, Florida, Alabama, Georgia, Louisiana, and Texas. These states formed the Confederate States of America in early 1861, marking the beginning of the American Civil War.