What utter drivel.
The moral face-off between good and evil is core to a great many religions, most notably Christianity. Concepts of right and wrong, and the clash between them, has formed the core of many strains of philosophical, religious, cultural and literary thought for 2,500 years, at least.
Such thought, particularly Christian thought, has influenced the literature of Western Europe for many centuries. It's hard to find a writer who was not at least aware of God-vs-the-devil story lines.
Sorry, professor, but western civilization has existed for much longer than you imagine. Not everything is political, ok?