And though these devastating events are usually meant to be fought between nations’ armies, the violence often spills into the civilian realm resulting in the deaths of countless innocent lives (which is why the total numbers of war casualties are so large and heartbreaking). Apart from direct battle results, the statistics from the deadliest wars in human history also include war-related deaths caused by side effects such as induced epidemics, diseases, famines, atrocities, genocides etc. In order to bring awareness as to the devastating impacts of wars, we have compiled a list ranking the 25 deadliest wars in human history. No matter what caused the conflicts, one thing is for sure – these wars cannot be considered anything but absolutely horrifying human tragedies that should have never happened. Let’s hope that by remembering our past, we are not doomed to repeat it.