I first heard about so-called properly basic beliefs in the context of discussions about belief in God. Moreover, when I do a Google search for the term "properly basic belief," I get a bunch of results having to do with Christianity and God.
So, I am curious, was the notion of PBB invented in a religious context? Who came up with it, originally?
Obviously, Plantinga is one of its chief champions. Was he the one who originated it?