The North won the Civil War due to having several strategic advantages over the South in terms of population, industry, transportation infrastructure like railroads, and access to military resources. The North also increased its population through African American recruiting after the Emancipation Proclamation. While the South had initial advantages in fighting a defensive war on its own territory, it ultimately lost due to the North's greater capacity for waging a long-term war of attrition through its larger population and industrial base.