1900-1920: Progressive Era A period of varied reforms that took place throughout the US over the first two decades of the 20th century. While much of that change was enacted by the U.S. Congress under the leadership of three consecutive presidents— Theodore Roosevelt, William Howard Taft, and Woodrow Wilson— it was also a movement that generated a variety of changes at the state and local levels as well. (1 janv. 1900 – 1 janv. 1920)

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