[315][316][317] Roosevelt's youngest son, Quentin, a pilot with the American forces in France, was killed when shot down behind German lines on July 14, 1918, at the age of 20. It is said that Quentin's death distressed Roosevelt so much that he never recovered from his loss.[318]

League of Nations
Further information: League to Enforce Peace
Roosevelt was an early supporter of the modern view that there needs to be a global order. In his Nobel prize address of 1910, he said, "it would be a master stroke if those great Powers honestly bent on peace would form a League of Peace, not only to keep the peace among themselves, but to prevent, by force if necessary, its being broken by others."[319] It would have executive power such as the Hague Conventions of 1899 and 1907 lacked. He called for American participation.
When World War I broke out, Roosevelt proposed "a World League for the Peace of Righteousness", in September 1914, which would preserve sovereignty but limit armaments and require arbitration. 