Harriette Leffingwell

“The isolationists argued that if the US had stayed out of the Great War - or, as it later became known, World War I - there never would have been a World War II. By 1917 the warring protagonists - Britain, France, Germany, Austria, and others - had suffered millions of casualties and were exhausted. The German populace was starving. The isolationists believed that a resolution was inevitable without the US involvement that resulted in 116,000 dead fathers, brothers and sons.  They argued that if the United States had stayed out of the Great War, no one would ever have heard of Adolf Hitler.”
― Dale A. Jenkins, Diplomats & Admirals: From Failed Negotiations and Tragic Misjudgments to Powerful Leaders and Heroic Deeds, the Untold Story of the Pacific War from Pearl Harbor to Midway