There is great intricacy of social interaction among families and close tribes, between brothers and sisters, cousins, uncles and the like. The Fijian concept of "family" does not align with the Western notion of a normative family. Extended family members will adopt roles and titles of a direct guardian. The iTaukei (Indigenous Fijians) culture is not based on biological lineage but instead on a child's link to a spiritual ancestor. This has proved to be somewhat of a hurdle when attempting to apply Western culture in a Fijian landscape, such as the use of a predominantly Western criminal justice system.