In the secular city, it is said, should prevail exclusively shared by all reasons. Democratic systems have to be considered equally to all citizens, regardless of their religious affiliation. However, the growing diversity of the West requires an update of these regulatory principles of political life. Our society is secular, in the sense that religious dogmas do not have the force of law. However, religion has not gone public or been privatized space.

But if the vitality of religions seems to question the secularization thesis, that does not say that it is producing a "return of religion". The debate about secularism tries to define the proper place of religion in democracy determining institutional mechanisms while ensuring freedom of conscience and religious freedom.