A recent article in the Washington Post ponders the whys of lateralization. According to the article:
"Left-handed people are more likely to die from accidents. They may also be more likely to have neurological, immunological or psychiatric diseases -- probably because at least some left-handedness arises from prenatal damage or birth trauma. Whether left-handed people have shorter lives on average is in dispute.So posits the research as to why lefties exist at all.
Despite those "costs," left-handedness has persisted through human evolution. One of the reasons is simple: Lefties do better in fights."
As far as I'm concerned, it's not surprising to find unique and superior examples of any species throughout nature. Some of us are born special, others right-handed...