Living in a religionless world

How do your IB Philosophy students react to Bonhoeffer’s suggestion that Christianity was already, back some seventy odd years ago, a religion having lost its initial spirit and very substance? After all, is religion nothing more than a cultural phenomenon like any other? Why did it take Christianity an emperor’s edict - Constantine’s - to impose itself as the official religion of the Roman Empire? Is the fate of any religion irremediably attached to political circumstances which, for instance, make ...