Why being wrong really hurts

When we are criticised it hurts our feelings, but the pain goes much deeper than that, says Paul Randolph
Why do sensible and rational people seem to lose the ability to act sensibly and rationally when they are in conflict? What makes some families tear themselves apart in a variety of squabbles which to outsiders may seem petty but which result in family members not speaking to each other for years? What drives neighbours to blight their daily lives with unpleasant, bitter and confrontational