A very simple question popped in my head today. Why is that some people are right handed and others are left handed? What makes the right side so much better that more people are right handed? It must have started somewhere in the history of men where right hand was preferred over left hand for physical labour. Now then, why right hand? Was it simple as some ancient hunter thinking he should concentrate on developing skills with one hand rather than trying to develop both? Or is it that things in nature was meant for right handed people?

Any theories?