So this is the kind of news that one ought to be careful with now that everyone has had a chance to read the Black Swan.

It has probably more to do with genetic drift. You cannot stumble upon a tribe, take some random property they all share, and then make causal inferences from all the other properties they all share. This holds especially when this property correlates with survival of the tribe; it is actually more informative to investigate a group of people with properties that reduce survival, e.g. bad heart conditions.

> If you look up the lifespan of the Tsimane, you will find that it is much shorter than those living in the United States.

To have a fair comparison if their hearts are really healthier this should be taken into consideration. If you exclude those deaths by animals, during birth, etc, how long would be the average lifespan? And those who live longer still have healthier hearts?

> I also got a pretty clear idea of how the they rest. It was a predictable schedule that was entirely based on light. As soon as the sun went down in the late evening, people retired to their huts, and within half an hour, I heard deep breathing and snoring all over the camp. Turns out if you don't have a device to stare at, you tend to sleep early and deeply. Around nine hours later, with the call and answer of the rooster in the distance, the camp would start to stir and another day of hunting, gathering -- and soccer playing -- would begin.

Lol, I thought people woke up in the middle of the night and had sex and prayed and stuff?

Anyway heart disease DOI is probably - 10.1016/S0140-6736(17)30752-3

>But up until the day they die, the Tsimane are often very healthy.

This is a silly statement of course. Two-thirds of Tsimane adults suffer from intestinal helminths.

And if you count mental health, violence is also of course incredibly high.