We live in a world where all organisms function in groups. It has been the route for survival. Humans are social animals and we strive for acceptance from our family, friends, peers & society at large. 90% of humans prefer being in groups, with a bunch of people who share similar views, perspectives or preferences. There are many people who form own groups. The people in the same group have some similarities that keep on them binding in the group.
Every living being is unique in their own way. Be it single celled organisms or humans, each are different from the other even within the same species. We are special and Unique, and our preferences, ideals, goals, principles & perception are unique too. A healthy society or group is one which nurtures the goodness and helps remove the negativity. Because of the people in the same group, the uniqueness of each one can be identified and in many cases people can be helpful to each other in critical situation. This makes one love to be in the group and nurture the feeling of belongingness to the group. There are many moments people in the group love which offers them great feelings to each other.