I haven't read this book and I can't critically examine all of its claims. Yet some of the conclusions are rather interesting. For example, while 92% of Americans profess to believe in God, that still shows a significant decline compared to several decades ago.
“Several decades ago there was not a strong correlation between how religiously active you were and whether you voted Republican or Democrat,” Chaves says. “Now, there is. If you’re religiously active, you’re now more likely to vote Republican.”