Tribalism is the state of being organized in, or advocating for, a tribe or tribes. In terms of conformity, tribalism may also refer to a way of thinking or behaving in which people are more loyal to their tribe than to their friends, their country, or any other social group. The social structure of a tribe can vary greatly from case to case, but, due to the size of tribes, it is always a relatively simple role structure, with few (if any) significant social distinctions between individuals. Tribalism implies the possession of a strong cultural or ethnic identity that separates one member of a group from the members of another group. It is a precondition for members of a tribe to possess a strong feeling of identity for a true tribal society to form. The distinction between these two definitions for tribalism is an important one because, while tribal society no longer strictly exists in the western world, tribalism, by this second definition, is arguably undiminished. People have postulated that the human brain is hard-wired towards tribalism due to its evolutionary advantages. In other words, tribalism is the natural state of organization for man.