This book investigates the core definition and enduring relevance of the Enlightenment by analyzing Immanuel Kant’s seminal essay on the subject. Samuel Fleischacker, a distinguished philosopher, examines the historical context and the philosophical arguments presented by Kant regarding individual autonomy, the role of tradition, and the public use of reason. By situating these ideas within their original eighteenth-century framework, the author argues that the Enlightenment remains a vital, ongoing project for modern democratic societies.

Scholars and students of philosophy frequently cite this work as an accessible yet rigorous entry point into Kantian thought. Experts highlight the author's ability to bridge the gap between historical analysis and modern political application, making it a foundational text for those studying the evolution of liberal ideals.