On Power is a 208-page hardcover book by bestselling author and nationally syndicated radio host Mark R. Levin, published on July 29, 2025 by Threshold Editions, an imprint of Simon & Schuster. It is Levin's eighth consecutive #1 New York Times Bestseller.

In this work, Levin delivers a philosophical analysis of how power operates throughout history and shapes the destiny of nations. Drawing on ideas from thinkers such as Alexis de Tocqueville and Frédéric Bastiat, the book contrasts tyrannical power—exercised through force and coercion to strip individuals of their freedoms—with constructive power rooted in consent, constitutional checks and balances, and the protection of individual rights.

The book explores the nature of negative versus positive power, the role of language in shaping political understanding, individual liberty, constitutional governance, and conservative philosophy. It is a significant work in political science and American conservative thought, offering insights into the enduring struggle between liberty and concentrated authority.