"Den usynlige religionen" er Luckmanns analyse av fagarbeidet i religionssosiologi og hva det var i stand til å si og ikke om den aktuelle samfunnsvirkeligheten. Boken startet en diskusjon, som fortsatt pågår, om fundamentene i forståelsen av religion når boken først kom ut i 1963. Han tar for seg og stiller spørsmål om blant annet privatreligiøsitet, nyreligiøsitet, hvorvidt mennesket er religiøst, og sekularisering. Den tyske utgaven fra 1991 hadde et tillegg som utdyper hovedtanken om religion. Det er også med i denne norske utgaven.
The Church-State relationships in EU Member States are in a process of a radical transformation. This is the result of a rapid political integration and also of the major transformations of the modernity. Religion is still part of the European public space even if, according to modernity premises, it should be only a private matter. According to Max Weber and other authors, secularization diminishes the role of the religion in society. However, these theories are being contested in recent years, due to the interpretation of statistical data and to the emergence of fundamentalist religious movements spreading around the world. Consequently, secularization is a tendency and not an "iron law". As regards the current role of the religion, Silvio Ferrari developed the theory according to which there is a common European model. This model does not exist yet, but certainly we live in an era defined by the continuous searching of such a model. There is no European identity without common values. Some of these values, like toleration, do have a profound religious foundation. European integration is based on the action of different actors, including interest groups located in Brussels. The Churches and the religious organizations are also part of this category of actors and they try to be part of a process by which a common space for consultation will emerge.
