Re:... evolution has purposely kept them ... (Score 1)

If this "fighting hand" advantage (or anything resembling it) has been a factor in natural selection, then we ought to see roughly even distibution of left and right handedness, as the advantage would always go to the minority, and thus tip the scales back into balance.

Instead, we find only five percent or so of the population is left-handed.

I do wish the people who leap eagerly to find "evolutionary rationale" for the human foible du jour would at least think their arguments through on their own terms.