Lunacy has always been reflected upon by Western thinkers. The acceptance of its putative causes has varied across centuries and cultures. In all of them, it has been difficult, above all, to establish boundaries beyond which insanity is definitive. Plato considered insanity to be the manifestation of a mystic spirit that inspired but a few. Medieval and Renaissance thought admitted lunacy’s nature to be good or bad, divine or diabolic, religious, moral or health related. Early ethnopsychiatry considered culture and personality unimportant to explain lunacy Similarly, Freud thought that lunacy lives in the subconscious. Starting in the 17th century, the Cartesian paradigm established reason’s supremacy as the mediator of knowledge, w...