One observation that Jonathan has made about our culture is that we have more material possessions than ever before, and yet people seem more discontent and angrier than ever.
"It's a really striking paradox," Jonathan says. "The richest country in the history of the earth, and everybody is p.o.'d all the time. It doesn't really speak well for the ability of material success to bring happiness, does it?"
Want to know more? Watch Jonathan's entire book club discussion
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