Le Développement du concept d’istopie is a French scholarly monograph that traces the evolution of the idea of utopia from its earliest philosophical roots to contemporary interpretations. Drawing on a wide range of primary sources—from Plato and Augustine to modern theorists—the author examines how the notion of an ideal society has been shaped by cultural, political, and intellectual currents over the centuries. The book offers a critical assessment of the utopian tradition, highlighting both its inspirational aspirations and its practical limitations. It is intended for students and researchers in philosophy, history, and literary studies who are interested in the intellectual history of utopian thought.