which world war had more casualties
1 Follow this topic on Facebook!  World War 2 Casualties. World War 2 was the bloodiest conflict in human history. There were more than 60 million World War 2 casualties resulting in death which at the time was more than 2.5% of the overall world population. The war was notable for the Nazi-sponsored genocide of the Jewish peoples resulting in more than 5.9 million deaths, and the impact of âTotal Warâ on the worldâs population.