The social structure of a tribe can vary greatly from case to case .
The relatively small size of customary tribes makes social life in such of tribes usually involve a relatively undifferentiated role structure , with few significant political or economic distinctions between individuals .
The social structure of a tribe can vary greatly from case to case , but the relatively small size of customary tribes makes social life in such of tribes usually involve a relatively undifferentiated role structure , with few significant political or economic distinctions between individuals .