Who is quote war to end all wars?

Answer 1

The phrase "the war to end war" was coined by H. G. Wells. It first appeared in his book entitled, "The War That Will End War," that was published in 1914. Despite the fact that he only publicly used the phrase once, however, it is often associated with Woodrow Wilson.

Answer 2

it was declared in a speech by President Woodrow Wilson when he adressed congress in 1917.

reference: Wikipedia, check their references to see pure source.

Answer 3

It was said that WW1 would be the war that ended all wars.

Answer 4

Woodrow Wilson