According to “World War I," The Columbia Encyclopedia, 6th Edition, 2008. Encyclopedia.com. (January 10, 2010). http://www.encyclopedia.com/doc/1E1-WW1.html. "To calculate the total losses caused by the war is impossible. About 10 million dead and 20 million wounded is a conservative estimate. Starvation and epidemics raised the total in the immediate postwar years."
Quoted in Kenneth Surin, Theology and the Problem of Evil (Basil Blackwell, 2004), 67, as cited in Karen Kilby, “Evil and the Limits of Theology,” Theologyphilosphycentre.co.uk, Accessed October 23, 2009.