Jay and I have been bantering the 'Joe Horn' case, discussing various aspects of it and what it means to the greater society. Along the way, Jay mentioned the concept of 'duty to retreat'. The concept is based on the idea that when faced with an aggressor, a person has a moral duty to avoid confrontation, to give up ground and back away. That when a criminal gets it in his head that he wants to take something, we should just let him do so. That if he hurts someone, we should not try to prevent it. That the most...