 Indeed, religious assimilation among immigrant groups most commonly involves such minor changes, rather than sweeping change in religious belief systems.In sharp contrast to other aspects of cultural assimilation such as language and nationality, dominant cultures in general tend not to expect immigrants to adopt the dominant religion.Some researchers, such as Will Herberg, have advanced a thesis of perpetual religious pluralism, to the effect that immigrants would typically retain their religious affiliation even after complete cultural assimilation in other aspects of culture.