Alving Plantinga on Naturalism as Quasi-ReligionWhere the Conflict Really Lies : Science, Religion, and Naturalism (2011-10-26: Oxford University Press), Preface.
Naturalism is what we could call a worldview, a sort of total way of looking at ourselves and our world. It isn’t clearly a religion: the term “religion” is vague, and naturalism falls into the vague area of its application. Still, naturalism plays many of the same roles as a religion. In particular, it gives answers to the great human questions: Is there such a person as God? How should we live? Can we look forward to life after death? What is our place in the universe? How are we related to other creatures? Naturalism gives answers here: there is no God, and it makes no sense to hope for life after death. As to our place in the grand scheme of things, we human beings are just another animal with a peculiar way of making a living. Naturalism isn’t clearly a religion; but since it plays some of the same roles as a religion, we could properly call it a quasi-religion.