Cotton become most important crop in the south (previously was Tabacco)
Interchangeable parts (by Eli Whitney and Fulton) which speeds up production of rifles and other things
railroads move goods quickly, Regions specialize in their own products
(south, cotton) (north, factories)(west food)
South got ****ed in the civil war with their only resource being cotton but they turned it around and sold it to Britain for materials.
Labor unions become more prominent