The inventor of the essay, a 16th-century nobleman who retired to his tower to write about whatever crossed his mind, from thumbs to cannibals, always circling the same question: what do I know? His school is Pyrrhonian skepticism: same goal as the Stoics and Epicureans (eudaimonia, flourishing), but the path is doubt, suspend judgment (epojé) and reach calm (ataraxia). He had his ceiling beams engraved with his favorite quotes, which makes him the patron saint of anyone who keeps a public notebook. More: Cómo vivir según Montaigne with Marcos Vázquez.