The Progressive Era may be described as a broad-based response by Americans from diverse backgrounds to the emergence of the United States as a modern, urban, industrial, and multicultural world power during the period 1890 to 1920. The Historical Dictionary of the Progressive Era, 1890-1920 is a comprehensive source detailing the people and events that made this a notable period in American history. The volume provides biographical sketches of the most prominent individuals of the period along with entries on major reform and professional organizations, key legislative enactments, commissions and committees, schools of interpretation, and important concepts. In each entry the contributor presents the most important factual information and an interpretation of the topic's significance. Where applicable, each entry has a bibliography that includes the manuscript collection and the standard and revisionist works on the topic. The dictionary also includes an introductory essay and a chronology of important events. A subject index containing organizations, laws, concepts, states, and cities concludes the work. This historical dictionary will serve as a primary reference source for students and scholars of a significant era in American history.