This document provides definitions and context for key terms related to the late 19th and early 20th century history of the United States. It defines individuals like Josiah Strong who founded the Social Gospel movement and Emilio Aguinaldo who led resistance to American occupation in the Philippines. It also summarizes events and policies such as the Spanish-American War, the Open Door Policy in China, and the establishment of the Federal Trade Commission. The document provides an overview of many important historical figures, conflicts, reforms, and institutions from this era in 3 pages of dense terms and explanations.