There are two theories to suggest why a mere 4% of the world population is left handed. One theory states that the human brain is designed that way – that is the left half of the brain controls the right part of the body and vice versa. And as a rule, for too many people, the left brain predominates over the right brain and hence they are all right handed.
Another theory suggests that the human body is asymmetrical and the strength in the right side of the body including the hands, legs and including the jaw muscles is more than the left side and hence these people are all right handed.
