Invariably the discussion about the function of religion centers around its integrative potential. However, this paper develops some hypotheses about the various ways Western religious institutions and ideologies compete. The author suggests that this takes place on at least three levels: (a) On the level of institutional loyalty, those religious organizations which had to compete have invariably turned out to have a better hold on their membership; (b) On the level of identity formation, Western religious orientations of the sectarian type have generally successfully competed with other foci of identity; (c) On the level of ideology, Western religious salvation doctrines have had the competitive advantage of a careful balance between emotional anchorage and comprehensive explanation.