Is it possible to separate out religious influences from centuries-old societal customs? And if so, just how does a journalist go about doing this?

This is not an easy task. That goes double for journalists -- perhaps most journalists -- with little exposure to the principles of group dynamics or the psychology of institutional religion.

This may sound like hubris on my part, but I believe that the wide experience gained on the religion beat prepares journalists to better understand humanity’s complex social and psychological formulations -- allowing religion writers and editors to (potentially) better parse the differences.

This recent New York Times story on the semi-isolation of menstruating women in remote western Nepal, causing the death of some, provides a platform for exploring the question.

But first, a quick return to Brazil.

You may recall that a few weeks ago I posted here on the custom of some indigenous Brazilian tribes to murder unwanted children. I tried to explain how from their tribal perspective the practice made sense.

I noted that in their rain forest environment, where food is surprisingly difficult to come by, the children -- fatherless or physically impaired -- were in the tribes’ view being sacrificed for a greater good. That's because they could not contribute to the group's food supply, which tribal leaders deemed an unacceptable burden that threatened the entire group's survival.

I also noted how outrageously obscene the practice seems when considered from a Western mindset rooted in the Abrahamic religious traditions. My point was to illustrate how difficult it is for journalists to put aside their deepest values when covering groups with a vastly different belief set.

The late Huston Smith, the renowned scholar of comparative religion, once wrote, I’m paraphrasing now, that every civilization -- and by every civilization he even included small, semi-nomadic jungle tribes -- is influenced by some spiritual vision of how life is best lived.

I take that to mean that in the Brazilian case, the tribes were following some inner sense of their own notion of right and wrong, even if they did not articulate it in spiritual or religious terms.