Woodrow Wilson gave the Fourteen Points speech so it would be known what the United States a long term objectives were for World War I.
Essentially Wilson's plan for peace called for the creation of the League of Nations (predecessor to the UN) which would create a multi-national cooperation and regulatory agency. However, the downfall of the League was that America never joined. The political climate in the states was against Wilson, and thus Congress voted to abstain from joining. Without the United States (which officially became a world power during WWI), the league had little power. It further lost credibility when it failed to stop Italy from invading Ethiopia and Japan from annexing Manchuria in 1931. Thus when Hitler re-militarized the Rhineland the L of N did nothing. Furthermore, European leaders, still reeling from the casualties of WWI, pursued a policy of appeasement, thinking they could avoid another costly war