World War II caused an unprecedented amount of human losses. According to estimates, the total number of casualties, including both military and civilians, was around 70-85 million people. This includes approximately 40-50 million deaths, making it the deadliest conflict in human history. The war also left millions of people injured, displaced, or homeless. These devastating losses serve as a constant reminder of the horrors of war and the importance of striving for peace and diplomacy.