John Brown led a raid on a federal arsenal in 1859 hoping to spark a slave uprising, but he failed to gain support and was executed. His actions were viewed differently, seen as fanatical by some but heroic by others like Thoreau. The US had developed differing regional societies by the 1800s, with the North industrializing and the South dependent on slavery. The Civil War ended slavery but Reconstruction faced resistance. Segregation became law after the Civil Rights Act was overturned and Jim Crow laws enforced racial separation despite some protest movements emerging.