The word "propensity" in literature often connotes an intrinsic inclination or disposition that defines a character’s nature or behavior. Authors use it to suggest both admirable and nefarious tendencies, as when Poe implies that proper physical action might expel wickedness [1] or when Austen points to a habitual inclination toward animosity [2]. In moral and philosophical discourse, it stands for natural drives that must be regulated, whether to foster ethical self-esteem as Kant explores [3] or to examine the instinctual lure toward vice, as Freud considers in his exploration of criminal behavior [4]. Meanwhile, writers also cast it in a more neutral or even positive light, describing tendencies related to creativity, vigor, or even the pursuit of virtue [5, 6]. Thus, across diverse texts—from the reflective musings of Hume and de Tocqueville to the satirical observations in Dickens—the term bridges the realms of innate temperament and cultural commentary, deepening our understanding of human nature.