In 1890 Populists won control of the Kansas state legislature, and Kansan William Peffer became the party's first U.S. Senator.
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The greatest weakness of the League of Nations was the set up of the Treaty of Versailles. The treaty was hated, most by the Germans and the Americans. The league was hated too.
-The Cold War: Both the United States and the Soviet Union emerged as superpowers, but with different ideologies. This led to a long "Cold War," which also was the cause of several proxy wars all over the world in the following decades.
-founding of United Nations in the place of the League of Nations.
-Territorial changes of Germany, Poland and some other countries: Germany lost big parts of land, Poland was "moved" west