/lit/ - Literature

>>23402028
In actuality we have some data. Intelligence of ancient hunter gathers even in Europe was probably very low and comparable to 3rd world countries (based on what was explained here >>23401145
GWAS). EA3, EA4 and IQ PGS are polygenic scores more or less predicting Educational Attainment (EA) and IQ respectively.
What this study in particular found (and replicated an earlier result) was that Intelligence in pre-modern times likely peaked in Republican Rome (whom were eventually genetically replaced by Near-Easterners and Greeks). Vikings were also likely quite dumb.
In just the same way Jared makes his story, I could do the same but one that doesn't scream incredulity and better yet is backed by data.
Civilization and its emergent complexity creates selection pressures that favor pro-Civilization traits (at least initially) such as intelligence and cooperation. Whilst in a hunter-gatherer society a 90 IQ and 120 IQ can pretty much survive equally well in their simple instant-gratification environment (eat food, drink water, stay warm etc.), early civilization allows for the cleverer person to get ahead somehow (be it by better delaying gratification, being a good merchant, a skilled artisan etc.). In other words, applying a selection pressure to humans that is not unlike how it domesticated dogs. This gives rise to a high civilization like Ancient Rome or Renaissance Europe. Eventually this process likely starts to reverse, as the society becomes so advanced that the pressures are nullified or even reversed (as we see today; intelligence is negatively correlated with fertility (welfare queans)), though in Rome's case (and happening today as well), as I stated earlier, the replacement of the population that created the civilization almost certainly played a much bigger role as this happens much quicker than the slow process of dysgenics.
Irrespective of the post-hoc rationalization, the observations take precendence. To try to make a claim that New Guineans are smarter than the people that created nearly everything in the modern world and have sent probes outside the solar system is something only a Jew could come up with.