Hundreds of thousands died of disease. Roughly 2% of the population, an estimated 620,000 men, lost their lives in the line of duty. Taken as a percentage of today's population, the toll would have risen as high as 6 million souls. The human cost of the Civil War was beyond anybody's expectations.
Some of the American people blamed the Great Depression on Capitalism. Capitalism is when a country's trade is controlled by private owners and everything is for profit.