The subtitle is How the Nature of Belief Shapes the Fate of Societies.  Here is Ryan doing a podcast with Brink Lindsey.  As Brink writes:

All of the blessings of modernity, Ryan Avent argues in a fascinating new book, rest on faith. It is our faith in others, our ability to trust strangers we will never meet, that makes possible the large-scale cooperation that has given us science, modern economic growth, and liberal democracy. But if everything depends on our ability to weave and maintain particular webs of complex meaning, what happens when we allow those webs to weaken and fray? In his book In Good Faith, Ryan contends that the dysfunctions and discontents plaguing 21st century democracies reflect such underlying neglect.

I am pleased to see “thought books,” as one might call them, headed in this direction and I was happy to blurb Ryan’s latest effort.