Pia Philsophia (Perennial Philosophy) is a doctrine that emphasizes the growth, development, and gradual "education of humanity" as preparation for a "final revelation." 
Related LP Terms
European Grand Narrative > Elite Religion, Elite Spirituality, Regime of Accumulation
Non-LP Related Terms
European Grand Narrative > Common Core, Perennial Philosophy, Philosophia Perennis, Pia Philosophia, Platonic Orientalism, Prisca Theologia
Pia Philosophia has had a major influence in technocratic/engineering circles. See David Nobles Religion of Technology.
"Pia philosophia is merely one option among many similar terms that were used at the time, such as, for example, prisca sapientia, christiana philosophia, mosaica philosophia, caelestis philosophia, vetus theologia, and even nova theologia (see Di Napoli, “Il concetto di ‘philosophia perennis’,” 266–268)."