Earlier quoted context omitted.
Does the current state of society not give you pause when you state that our bodies are so resilient to most foods? US obesity rates have nearly tripled in way less than a single generation, there are skyrocketing rates of mental illness, reduced academic achievement, and even evidence of a decline in IQ in developed nations. I find it challenging to attribute this entirely to lifestyle changes and the internet. In t…
> even evidence of a decline in IQ in developed nations Can you expand on this? Only thing I've heard is the Flynn effect, which is probably longer-term... And the only other thing I think of in association with "long-term, potentially worrisome, population-wide unexplained decline" is testosterone levels.
This has been observed to have reversed in many developed nations. By reversed it's not like it's reaching an asymptotic zero rate of growth, but genuinely decreasing. This was first observed in Scandinavian countries in the mid nineties. Outside of Scandinavia this decline has been corroborated in at least the UK, Australia, Germany, France, and the Netherlands. It's probably reasonable to hypothesize that the reason it's yet to be corroborated elsewhere is a mix of the lack of testing or a lack of earlier testing to compare against. Scandinavia, for instance, has compulsory enlistment which, in turn, entails compulsory IQ testing which is then made publicly available. The declines are also extremely significant. For instance in the extreme case, Denmark IQ's dropped by 1.5 points on average in just 5 years.
For now the exact cause(s) are not agreed upon and it's a topic that isn't receiving anywhere near the attention deserves due to people's sensitivity to the topic. Dysgenic factors are almost certainly playing some role, but a decline has also been observed even between brothers. Again, yet another mystery of society somehow deteriorating for no apparent reason. In this case, I do think us inadvertently poisoning ourselves (yet again) in some way or another is probably the best case scenario.
Wiki has a decent paragraph on the topic [1]. Searches or things like Google Scholar can turn up far more as well.
[1] - https://en.wikipedia.org/wiki/Flynn_effect#Possible_end_of_p...