Slavery obviously. The North had more factories and they farmed food products. A large Southern export was cotton. The North also had a higher population, more cities. The South had more military bases. How many do you need?
The Ten-Percent Plan. Lincoln's blueprint for Reconstruction included the Ten-Percent Plan,which specified that a southern state could be readmitted into the Union once 10 percent of its voters (from the voter rolls for the election of 1860) swore an oath of allegiance to the Union.
Because you want to make sure you are making the right decisions. Like for instance if you didn’t make a decision to go to school or a career you would be a broke human being and in 2020 you need money to survive. You also need skills and Recognition.