I think there probably would be more left handers in the world. When the kids were babies and infants we were always placing things like rattles and spoons etc in their right hand, even though it seemed natural for them to use their left hand. I think it may be because when they are looking at you and learning they mimmick, your right arm is their left.
If that theory is correct, and it's probably a load of bullshit, then if the majority of us were left it would seem more natural for infants to use their right.