Always an excellent idea to start off a study with an attempt to prove a preconceived point.
> Religion is highly variable, and therefore we need to ask why is it sometimes popular and why it isn't," Paul said. "One thing we do know is that it's only popular in societies that … have enough rate of dysfunction that people are anxious about their daily lives, so they're looking to the gods for help in their daily lives.
A supermajority of people in every western country believe in god or some higher power: https://www.pewforum.org/2018/05/29/beliefs-about-god/pf_05-...
No Western European country has more than 20% atheists: https://www-pewresearch-org.cdn.ampproject.org/i/s/www.pewre.... France is 15%, Germany is 10%. The US is 4%. People in developed countries are much less likely to participate in organized religion or subscribe to some general idea of spirituality, but atheists are still a small share of the population.