Is Left Handed Outstanding?

Er harskumar says, why are most people right handed, while no other animals prefer a specific arm? I don't have the answer to this. Most polar bears seem to be exclusively left handed. Cats seem to be equally adept with both arms. Maybe i will agree with it this but it's a very interesting question. Why did we evolve this way? And and ye le, let me try and find out why it is so.