Historians refer to the intellectual movement of the eighteenth century as the Enlightenment. Historians now tend to reject the idea that the Enlightenment was a single, self-conscious movement of thi...Historians refer to the intellectual movement of the eighteenth century as the Enlightenment. Historians now tend to reject the idea that the Enlightenment was a single, self-conscious movement of thinkers, but they still (usually) accept that there were indeed innovative new themes of thought running through much of the philosophical, literary, and technical writing of the period.