This document provides an extensive study guide covering many topics in American history from the post-Civil War era through the Progressive Era, including industrialization, political machines, immigration, labor unions, women's suffrage, agrarian discontent, muckrakers, and the presidencies of Theodore Roosevelt and William Howard Taft. It lists important people, events, ideas, policies, and social and economic developments to understand across this transformative period in the later 19th and early 20th centuries.