Revisiting Saint-Simonianism as an Innovative Utopia Summary The SAINT-SIMONISME 18-21 project is a multidisciplinary rediscovery of the largest utopian thought of the 19th century, designed and developed in its practical form between 1810 and 1880. It generated intellectual and practical innovations to deal with the uncertainties and risks of a changing world. Saint-Simonianism is examined through two different but interconnected ways. The first way is by retrospectively reinterpreting, back and forth across centuries (18th-21st), the great questions that Saint-Simonian thought confronted: new methods of organization and production, social justice, family and gender equality, the end of ideology and religious revival, the rejection of an independent economic discipline... The second way is by examining afresh the original writings — which are often hard to get through – with a modern gaze. With multi-version critical editions, it reanalyzes these texts and brings out potential for present-day application.