As the preceding answer suggests, the phrase "war to end all wars" was first used by H.G. Wells. Wells, like many idealists of his time, hoped that the sheer destructiveness of the First World War, unprecedented in its time, would persuade mankind to abandon war as a means of solving political disputes. read more
After it was over, World War I was called "the war to end all wars" because it was so destructive that the nations of the world wanted to prevent such slaughter from ever happening again. This prompted prolonged negotiations over proposed solutions like the League of Nations. read more
The idea that WWI would end all war was a hope that was cherished by some people at the time. However, it very quickly became clear that this was a misguided hope. The phrase “war to end all wars” was first used by the British author H. G. Wells. read more
World War 1 was the war to end all wars. It was the slogan to commiserate the total pain, bloodshed and agony suffered from the war. WW1 is attributed to being started by diplomatic ineptitude and WW2 was caused by diplomatic ineptitude caused by the terms put on Germany in the peace treaty from WW2. read more