Analysis of information sources in references of the Wikipedia article "Wealth" in English language version.
[...] around 35,000 years ago [...] we begin to see the first evidence of a more settled lifestyle, with burial sites, cave drawings, and decorative objects.
During this period, archeologists also begin to see evidence of trading between groups of early humans; the evidence included burial-site tools made from nonlocal materials, seashell jewelry found with noncoastal tribes, and patterns of movement suggesting trading routes.
With permanent settlements, a variety of tools, and the creation of trading networks, our ancestors achieved a level of cultural and economic sophistication that anthropologists refer to as a hunter-gatherer lifestyle.