The flickering gas lamp cast long shadows across the small room as old Mateo, his face a roadmap of wrinkles, began his tale. He spoke of Tito, a man whose life, from the dusty streets of his youth to the quiet dignity of his final years, seemed to offer a living, breathing case study in human motivation. Mateo, a keen observer of men, often mused on why Tito acted as he did, and I found myself drawn into his explanations, particularly as he would contrast what he called Tito's "calculating eye" with his "stubborn heart." These were, I later realized, rough approximations of two powerful ways to understand human behavior: Rational Choice Theory and Trait Theory.
Tito’s early life was a harsh teacher. Born into abject poverty in a small village outside of Oaxaca in the late 1940s, his choices were stark. Mateo described one pivotal moment when Tito, barely a teenager, had to decide between joining a group of boys stealing fruit from a wealthy landowner’s orchard or working an extra shift at the local market, carrying heavy sacks for pennies. The risk of being caught and severely punished for theft was real, yet the meager earnings from the market job offered little hope of alleviating his family’s hunger. Mateo recalled Tito’s quiet deliberation, his gaze fixed on the distant mountains, before he turned away from the orchard and towards the market. This, Mateo explained, was Tito making a rational choice: weighing the potential reward (food for his family, however small) against the perceived costs (punishment, moral compromise). He chose the path with the lowest perceived risk and the most immediate, albeit limited, tangible benefit. This pattern repeated throughout his young adulthood. When opportunities for steady work arose in the burgeoning factories of Mexico City, Tito, despite the allure of higher wages, chose jobs with more predictable hours and less dangerous conditions, even if they paid less than riskier, higher-paying positions. He wasn't driven by grand ambition, but by a pragmatic assessment of what would keep him and his family safe and fed.
Yet, to say Tito was only a calculating machine would be a profound disservice. Mateo always emphasized Tito’s inherent nature, his stubbornness, his deep-seated loyalty, and his quiet pride. These were not choices Tito made in the moment; they were fundamental aspects of his personality, his traits, that shaped the very framework of his decisions. Take, for instance, the time a distant cousin, long estranged, reappeared in desperate need of money. Tito had no obligation, and by rational choice theory, giving away his hard-earned savings would be illogical, reducing his own security. However, Tito’s innate sense of kinship and his deeply ingrained loyalty overrode any such cold calculation. He gave the cousin a significant portion of his savings without a second thought, a decision that Mateo attributed not to a sudden impulse, but to Tito’s unshakeable character. This wasn't a rational calculus of gain and loss; it was a manifestation of his ingrained trait of familial responsibility. Similarly, Tito’s quiet determination, a trait Mateo often called his "unbending spine," meant he would never stoop to deceit or manipulation, even when it might have offered a shortcut to a better life. He endured hardship with stoicism, not because it was the most rational thing to do, but because his personality simply wouldn't allow him to compromise his integrity.
The beauty of Mateo’s stories was how they illustrated these seemingly opposing theories not as rivals, but as intertwined forces. Tito’s rational choices were always filtered through the lens of his traits. His cautious nature, a core trait, led him to consistently choose the safer, more predictable option in his rational calculations. His loyalty, another trait, sometimes made what appeared to be an irrational choice in terms of personal gain, but was perfectly rational within the value system his traits dictated. He wasn't simply a cog in a machine of cost-benefit analysis; he was a man whose inherent disposition guided his choices, making him a complex, consistent, and ultimately, deeply human figure. Mateo’s anecdotes painted a picture of a life where the pragmatism of rational choice was tempered and directed by the unyielding bedrock of personality traits.