This hurts to read. As a lefty, I read these "studies" my whole life. The statistic that doesn't show here is the one I remember most: that lefties are much more likely to commit suicide than righties. Also none of these mention the sociological factors here. How until very(!) recently, lots of people were forced into right-handedness by schools or church. I would guess that this plays a big part in these numbers. Especially when viewing the gendered handedness. Would be interesting to examine that more.