The Fourth Party System is the term used in political science and history for the period in American political history from about 1896 to 1932 that was dominated by the Republican Party, excepting the 1912 split in which Democrats held the White House for eight years. American history texts usually call it the Progressive Era. The concept was introduced under the name "System of 1896" by E.E. Schattschneider in 1960, and the numbering scheme was added by political scientists in the mid-1960s.
The period featured a transformation from the issues of the Third Party System, which had focused on the American Civil War, Reconstruction, race and monetary issues. The era began in the severe depression of 1893 and the extraordinarily intense election of 1896. It included the Progressive Era, World War I, and the start of the Great Depression. The Great Depression caused a realignment that produced the Fifth Party System, dominated by the Democratic New Deal Coalition until the 1960s.
The central domestic issues concerned government regulation of railroads and large corporations ("trusts"), the money issue (gold versus silver), the protective tariff, the role of labor unions, child labor, the need for a new banking system, corruption in party politics, primary elections, direct election of senators, racial segregation, efficiency in government, women's suffrage, and control of immigration. Foreign policy centered on the 1898 Spanish–American War, Imperialism, the Mexican Revolution, World War I, and the creation of the League of Nations. Dominant personalities included presidents William McKinley (R), Theodore Roosevelt (R) and Woodrow Wilson (D), three-time presidential candidate William Jennings Bryan (D), and Wisconsin's progressive Republican Robert M. La Follette, Sr..