 One of Diderot’s great masterpieces, written during these years but only published posthumously, should be included as a part of the natural-philosophical corpus summarized above, even if it engages with these seminal questions of metaphysics and natural philosophy in an overtly literary manner, drawing more on Enlightenment epistolary novels and theater for its construction than the classical philosophical genres of antique philosophy (although one should recall that Plato wrote dialogues).