Tribalism is the state of being organized by, or advocating for, tribes or tribal lifestyles. Human evolution has primarily occurred in small groups, as opposed to mass societies, and humans naturally maintain a social network. In popular culture, tribalism may also refer to a way of thinking or behaving in which people are loyal to their social group above all else, or, derogatorily, a type of discrimination or animosity based upon group differences. Tribalism is the state of being organized by, or advocating for, tribes or tribal lifestyles. Human evolution has primarily occurred in small groups, as opposed to mass societies, and humans naturally maintain a social network. In popular culture, tribalism may also refer to a way of thinking or behaving in which people are loyal to their social group above all else, or, derogatorily, a type of discrimination or animosity based upon group differences. The word 'tribe' can be defined to mean an extended kin group or clan with a common ancestor, or can also be described as a group with shared interests, lifestyles and habits. The proverb 'birds of a feather flock together' describes homophily, the human tendency to form friendship networks with people of similar occupations, interests, and habits. Some tribes can be located in geographically proximate areas, like villages or bands, though telecommunications enables groups of people to form digital tribes using tools like social networking websites. In terms of conformity,tribalism has been defined as a 'subjectivity' or 'way of being' social frame in which communities are bound socially beyond immediate birth ties by the dominance of various modalities of face-to-face and object integration. Ontologically, tribalism is oriented around the valences of analogy, genealogy and mythology. That means that customary tribes have their social foundations in some variation of these tribal orientations, while often taking on traditional practices (e.g. Abrahamic religions such as Christianity, Judaism, and Islam), and modern practices, including monetary exchange, mobile communications, and modern education. The social structure of a tribe can vary greatly from case to case, but the relatively small size of customary tribes makes social life of such tribes usually involve a relatively undifferentiated role structure, with few significant political or economic distinctions between individuals. A tribe often refers to itself using its own language's word for 'people', and refers to other, neighboring tribes with various epithets. For example, the term 'Inuit' translates to 'people'. Tribalism implies the possession of a strong cultural or ethnic identity that separates one member of a group from the members of another group. Based on strong relations of proximity and kinship, members of a tribe tend to possess a strong feeling of identity. Objectively, for a customary tribal society to form there needs to be ongoing customary organization, enquiry and exchange. However, intense feelings of common identity can lead people to feel tribally connected. The distinction between these two definitions for tribalism, objective and subjective, is an important one because while tribal societies have been pushed to the edges of the Western world, tribalism, by the second definition, is arguably undiminished. A few writers have postulated that the human brain is hard-wired towards tribalism by its evolutionary advantages, but that claim is usually linked to equating original questions of sociality with tribalism. Tribalism has a very adaptive effect in human evolution. Humans are social animals and ill-equipped to live on their own. Tribalism and social bonding help to keep individuals committed to the group, even when personal relations may fray. That keeps individuals from wandering off or joining other groups. It also leads to bullying when a tribal member is unwilling to conform to the politics of the collective. Some scholars argue that inclusive fitness in humans involves kin selection and kin altruism, in which groups of an extended family with shared genes help others with similar genes, based on their coefficient of relationship (the amount of genes they have in common). Other scholars argue that fictive kinship is common in human organizations, allowing non-kin members to collaborate in groups like fraternities.