The correct answer would be The Ottoman Empire
In 1787 delegates from the thirteen states convened in Philadelphia to replace the unwieldy Articles of Confederation with a Constitution to endow the federal government with sufficient power to hold the country together. This short document, which was a result of both high idealism and low political horsetrading, has survived a Civil War and the massive expansion of the country to become the oldest constitution in the world. The Constitution itself, however, merely describes the functions of the federal government. It was left to ten Amendments, known as the Bill of Rights, to protect individual freedoms.
We could say that the growth of the cotton industry and the expansion of slavery into new states such as Alabama and Mississippi this ended hope's for a very gradual end to slavery so its opponents had the necessity to stop it from spreading to the new lands of the Louisiana Purchase. However, by the year of 1818 the northern states had a majority of growing immigrants in the House.
Well the other guys answer is technically right their a few more details to it. The league of nations was also another attempt to stop further wars between various groups in the world. They didn't want another Holocaust or world war to happen so it made it that all nations would turn on one nation or nations if they did go rogue and attack.
