Welcome to the site and thanks for expressing interest in it. To my knowledge, there is not an archaeological record of archaic Homo sapiens to fully illuminate whether they were conscious of social hierarchy. I imagine a sort of relative burial site, where individuals are buried with different significances, will help figure out how a archaic Homo sapiens social system was organized, but I don’t think that has been found yet.

That being said, I don’t completely wanna throw out some records of even older specimens that people have interpreted as evidence of social systems. Take these with a grain of salt. One example, the almost 2 million year old toothless hominin cranium from Dmanisi, has been thought to show evidence of care of the elderly was a factor in this very archaic hominin social group. Another example are implications of the “Shanidar 4, the “flower burial”,’ which is of a 80,000 Neandertal skeleton burial with pollen found inside it — implying Neandertals may have placed flowers in this grave, singifying a level of importance and social hierarchy.

Of course, both of these examples are not direct evidence that show us exactly how Neandertal and early Homo outside Africa social systems were but given the fact that nearly all primates live in stratified social systems, one can infer with some confidence that the most parsimonious model is one that includes and continues this cognitive trait in all primates, extinct or extant.

Kambiz