Old history work contained mythology. Modern history work covers anything that happened at the last 220 years of human existence(after French revolution).
Slavery. At the heart of the divide between the North and the South was slavery.
States' Rights. The idea of states' rights was not new to the Civil War. ...
Expansion
consequence
The Civil War confirmed the single political entity of the United States, led to freedom for more than four million enslaved Americans, established a more powerful and centralized federal government, and laid the foundation for America's emergence as a world power in the 20th century.
