Path to World War II In the early days of World War I, the US was eager to develop a neutral policy away from the war in Europe. However, both sides seek support from the United States and, more often, pose a threat to the United States. The negative attitude of the United States in the First World War extended the inevitable time and gave the price to the United States. American citizens did not want to participate in World War I and both Wilson and the Democratic Party knew that neutrality is an unacceptable position.
Historians agree that the course of World War II can be found in the massacres of the First World War. In the United States, the disillusionment during the war brought about a recession in active leadership in the world affairs. Problems such as communism, disarmament, relations with Latin America, and new aggression can not be ignored, but in the mid-1930's the United States revealed that the United States intends to move away from the future crisis in Europe. When the war broke out in 1939, America declared neutrality. But by 1941, this neutrality quickly disappeared, as President Franklin Roosevelt and his advisers started turning the United States into a "democratic pool". Japan's attack on the naval base of Hawaii and Pearl Harbor is the direct cause of the entry of the United States into World War II. The attack made the American people angry, and they united around the flag.
President Franklin Roosevelt recognized that the shortsighted unilateralism of the United States brought about the deterioration of World War II. Before the United States joined the conflict, he emphasized the multilateral commitment by advocating an expanded "Four Freedom" agenda and the "Atlantic Charter" signed in 1941. America won the Second World War, then won the Cold War. Roosevelt and his successors have led the postwar multilateral order since 1945 because it was not after 1919.
It should be a "war that ended all wars", but the Second World War began decades later. World War II began as a result of the desire for Germany and Japan to want more land. The total aftermath of this war eventually reached 2.5 million at that time, which was 2.5% of the world's population. It is impossible to say that the war of World War I is the end of all wars.