The Enlightenment The Enlightenment is a name given by historians to an intellectual movement that was predominant in the Western world during the 18th century. Strongly influenced by the rise of modern science and by the aftermath of the long religious conflict that followed the Reformation, the thinkers of the Enlightenment (called philosophes in France) were committed to secular views based on reason or human understanding only, which they hoped would provide a basis for beneficial changes affecting every area of life and thought. The more extreme and radical philosophes--Denis Diderot, Claude Adrien Helvetius, Baron d'Holbach, the Marquis de Condorcet, an