Left handers aren't very common. In fact , they only represent about 10 percent of the human population. But a new study suggests that the reason lefties are in the minority isn't anything suspect—rather, it boils down to the fact that the human race cooperate more than they compete.
In fact, in an entirely cooperative society, the hypothesis suggests that everybody would have the same dominant hand. The reason? It should, in theory, help us share things like tools.
Fortunately, Abrams' analysis confirms the speculation. The remaining 10 percent of left-handers represents the fact that the human race isn't entirely cooperative.
What's more, a new model created by the researchers can even predict the percentage of left-handers in any group—humans, birds, or even baseball players—given data about the degrees of cooperation and competition within the social structure. The results are published in The Journal of the Royal Society Interface.
Interestingly, the study also confirms why there are a disproportionate number of left-handers in some sports~. While cooperation breeds same-handeness, competition favours the unexpected. In sports like baseball, boxing, or fencing, players are at an advantage if they're unusual.
[Source - Internet]
