Millennials may be the least religious generation ever.

Based on the metrics described in the linked study, it seems that what they're measuring pertains to more to practicing religion in the traditional sense, but not necessarily to spiritual ideas and belief systems.

It isn't made completely clear how exactly they are defining religiousness, though. The publication says that respondents were given 18 choices, with one of them being "none," not mentioning what the other 17 were. It also states that the survey didn't specifically ask whether responders were atheists, and that a response of "none" didn't necessarily indicate such.

So say a participant was dabbling in wicca, or some other newer spiritual practice, but doesn't belong to any kind of religious body. Are they considered religious or non-religious? Without knowing the other 17 choices, we can't tell. The other 17 choices may not have suited a wiccan, so they may have chosen "none" when what they really meant was "other." Wicca is one of the fastest-growing religions among millennials, so it should have been important to state whether it was included. Or how about the label "spiritual but not religious," which is also becoming seemingly more popular? Was that a selectable option, or was it lumped into "none"?

Another question asks about frequency of attending "religious services," but the concept of religious services doesn't necessarily exist in all belief systems, especially the newer ones. "Religious services" could also be broadly interpreted. Hell, I've felt more connected to the divine getting a light show at a rave while candy flipping than I ever have sitting in church.

I would be curious to see a study that can show more broadly and in a more detailed way how belief systems are changing with newer generations, exactly what kinds of ideas are gaining and losing popularity, etc.

/r/science Thread Link - newscenter.sdsu.edu