Nordic Journal of Religion and Society vol:20 issue:2 pages:137-147
In order to test secularization theory on the individual level in a comparative perspective, the author argues that this cannot be done without linking levels of individual secularization to levels of societal secularization. This implies that we should be able to comparatively measure the level of societal secularization in the countries under study. In this article the author discusses indicators to measure the functional differentiation of the religious sub-system and other sub-systems of society (the political, juridical, educational, medical and family sub-systems). Finally, he suggests ways in which Rational Choice Theory can indirectly be integrated in a comparative study of secularization by analysing the competing groups that are implied in manifest conflicts concerning the secularization of society, what is called 'laïcisation' in French.