What happen if we do not follow the principle of inclusiveness?

In sociological term, the principle of inclusiveness refers to the tendency to accept people with different ethnicity background when we pick a team member.

When we purposefully overlook a certain group even though they are qualified to be a member, we would perpetuate discrimination toward those groups which resulted in tribalism and division that weakened the structure of our society.

Americans often speak of their country as one of several large regions.  these regions are cultural units rather than governmental units --  formed by history and geography and shaped by the economics, literature and folkways that all the parts of a region share. what makes one region different from another? a region's multicultural heritage as well as distinct demographic characteristics like age and occupation make regions different and special. within several regions, language is used differently and there are strong dialects. there are also differences in outlook and attitude based on geography.