A world consists of societies, a society consists of groups, and a group consists of individuals. People who share common purposes or goals would form a group. Common purposes or goals create solidarity - the sense of we-ness in a group. As the forms of solidarity, attraction, loyalty, identification and association exists in a group. What does attraction, loyalty, identification and association mean in the relationships among individuals in a group. In what occasion, these things can be seen in real life. A group can be also formed by people who share common characteristics or conditions. How Samuel P. Oliner, one of Holocaust survivor, think the difference of