Here are a couple of things mentioned in the episode you might want to check out:

Lancelot by Walker Percy

Priests for the Third Millenium by Timothy Cardinal Dolan

City of God by Saint Augustine

The Walking Dead Season 5 Episode 12

Foundations of Western Civilization (Great Courses) by Thomas F. X. Noble

The Importance of Having a Tribe by The Art of Manliness

Till We Have Faces by C. S. Lewis

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