This course explores the connection between the development of new literary forms and the burgeoning of philosophical notions in eighteenth century France. As they questioned the political, social and ethical norms of their time, the "philosophes" also started a major overhaul of the literary rules and conceptual framework they inherited from the "Grand siècle". Through a significant selection of non-classifiable tests, we study how this bubbling laboratory of ideas remain relevant for today's understanding of literature.