History Lesson: Humanity Would Be Better Off Not Repeating These 5 Wars
All wars are awful. Some wars are much, much more awful than others. This is by no means a comprehensive list, nor does it comprise anything but a fraction of the overall deaths in wars in human history. Still, the five wars on this list may have collectively killed up to a quarter of a billion people. These wars were big and upset the status quo. The Chinese Civil War turned more than half a billion people Red. World War II destroyed a totalitarian menace. Even the Mongol invasions echo in the present as an estimated 16 million people worldwide carry the genes of Genghis Khan.
Source: nationalinterest.org