It was the first civil war. Additionally, after the Civil War, 3 amendments were added to the Constitution that made it legal for the freedmen to vote. This allowed for new issues and a new movement to allow women to vote. After the civil war, segregation was implemented and that created the Civil Rights Movement to get rid of segregation. Hope this helps.
In the USA, children start school when they are five or six years old. Depending on the state, schooling is compulsory until the age of 16 or 18. Children younger than five can go to a nursery school or preschool.