This document outlines an inquiry-based lesson plan about how the definition of power and authority in the United States has changed over time. It presents a compelling question and several supporting questions to guide student inquiry. Source documents are provided relating to the founding era and Declaration of Independence, the Gilded Age, and a trial from the late 19th century to illustrate shifts in power and authority. The lesson aims to have students evaluate this evidence to understand how views of power and authority have evolved in the U.S.