Cognitive dissonance
The term 'Cognitive dissonance' was created by Leon Festinger, a social psychologist and professor, in 1957. He infiltrated into an eschatological religious group which were waiting for doomsday caused by 'Great flood'. They seemed to trust in a leader's direction sincererly. However, the last day supposed to perish didn't come. Festinger expected believers to get angry against their head of the group. But followers didn't show a wrath against the leader rather than they were relieved with no happening. Festinger recognized that human beings usually are skillful to deceive themselves to expel from unpleasant, irrational experience. To speak, we can't put up with our being weak or shabby enough to be hurted by other people and specific situaltions. On the contrary, we want to give an excuse not to violent against normal social system and strongly deny our wrong behavior or belief. It is really convenient system for our mental health. We are ready to defen...