Funny, but this just poses further questions. I.e. is it the absence of religion that causes wellbeing, or is it wellbeing that causes the absence of religion?

I was told the story by a stranger once: The reason why people cling to religion is because they are unable to live their own life, i.e. they struggle and can't live in the moment, because it would be too depressing, so they cling to religion to seek an escape. Religion absolves them from thinking and therefore from recognizing the world around them, and so it's an escape. So, in this view, bad times cause religion, but not the other way around. At least it's one possible explanation. I don't know whether it's true.

I'm just saying, don't confuse correlation with causality. Correlation does not imply causality in general. (though in this case it probably does)