When discussing "The Cross-Cultural Stream and Power Distance", four primary factors affecting a society's level of power distance are explained separately: the predominant religion or philosophy, the tradition of democratic principles of government, the existence of a strong middle class, and the proportion of immigrants in a society's population. Connections exist among the four fundamental phenomena, but the study concluded that a society's main beliefs, values, and religion, will have the strongest and longest lasting influence on power distance, which would be moderated by a democratic tradition and the existence of a strong middle class to some extent. Both factors are expected to narrow power distance. Finally, a large proportion of immigrants in a given society makes the low power distance trend stronger in all circumstances presented above. The study also concludes that regardless of religion, any society that does not have a tradition of democracy or a significant middle class will have a substantially high power distance levels.