Left-Handed People Are More Competitive, Says Science

"If almost everyone in a population is right-handed, being left-handed offers a frequency-dependent advantage: Being in the minority, left-handers are less predictable in competitive interactions (e.g., a boxing match), which may translate into small advantages (left hook!). But if left-handedness became very common, that advantage would disappear because others would adapt to encountering left-handers with the same frequency."

"In evolutionary terms, a 'stable equilibrium' is reached when the majority are right-handed and a minority are left-handed, because neither 'strategy' can completely eliminate the other since their advantages change depending on how frequent each is in the population."

"A study conducted by researchers at the University of Chieti-Pescara in Italy set out to confirm a hypothesis indicating that, while right-handed people have advantages in cooperative behaviors, left-handed people-particularly males, the study notes-have advantages in competitive behaviors, especially in one-on-one situations."

Left-handedness appears paradoxical from an evolutionary perspective, as natural selection should eliminate traits lacking survival advantages. Yet approximately 10% of humans remain left-handed throughout history. Research from the University of Chieti-Pescara proposes that while right-handed individuals excel in cooperative behaviors, left-handed people—particularly males—possess advantages in competitive, one-on-one interactions. Using evolutionarily stable strategy theory from game theory, researchers explain this persistence: left-handers gain unpredictability advantages as a minority, but these advantages diminish if left-handedness becomes common. This creates stable equilibrium where neither strategy completely dominates, as their relative advantages depend on population frequency. The study examined whether dominant hand correlates with specific personality traits.

Read at WIRED