The Progressive Era in the United States is generally recognized as the period from the 1890s to the 1920s. It was marked by a wide range of social, political, and economic reform efforts aimed at addressing the problems caused by rapid industrialization, urbanization, immigration, and political corruption. Key initiatives during this time included antitrust laws, labor protections, women's suffrage, and efforts to improve government efficiency and reduce corruption. Major milestones in the era include the assassination of President William McKinley in 1901, which brought Theodore Roosevelt to the presidency with progressive goals; the passage of significant legislation such as the Meat Inspection Act and Pure Food and Drug Act in 1906; the ratification of the 16th Amendment (income tax) in 1913; the 18th Amendment (Prohibition) in 1919; and the 19th Amendment granting women the right to vote in 1920. This era ended around the time of the United States' entry into World War I in 1917 and extended through the early 1920s, encompassing a transformative period in American history rich with reform-minded activism and legislative change.