I can't comprehend this. Scifi is famously occupied with the future, and not the current day. Space travel, advanced technologies, artificial intelligences, and generally things that don't yet exist are par for the course. Most of SF is literally not about the present.
Do you mean to say that SF's subtext reflects the zeitgeist at the time/place of its writing?
The Yanomamö simply killed each other efficiently enough to keep populations down. In practice they ran into violent neighbors long before they ran out of land to farm och game to hunt. For security reasons they had to leave large swathes of land as buffers between villages.
That's the result of the lack of politics, what you are referring to is policies that kept the different groups separated based on their choices or caused splits among them.
Hammurabi was a great politician because he reunited the Mesopotamian tribes in a single state city, convincing them to work for a common goal, making them all prosper together.
The article claims otherwise:
As time went by, evidence for Chagnon's claims became too overwhelming to ignore for most anthropologists. Numerous other anthropologists came to the same conclusions as Chagnon, both before and after his work. From Australia to Papua New Guinea to South America, the same phenomenon has been observed: Men kill each other at high rates in conflicts that center around the distribution of women.