By the end of the civil war how many people died?

It is estimated that around 620,000 soldiers died in the U.S. Civil War. Professor David Hacker says that the number is higher. He has done research on both sides and says that it was 750,00. He says that if the war was fought today, the toll would be 6.2 million. Many of the deaths were due to injuries later on. Disease, not actually combat deaths and injuries, caused about 2/3 of the deaths. He says: "Even if the number of war dead was 'only' 620,000, that still created a huge impact, especially in the South, and a figure of 750,000 makes that impact-and the demographic shadow it threw on the next two generations of Americans-just that much greater."