[defrost]

Easily answered - here is a map of Australian Aboriginal language groups [1] - less "tribes" more large extended family groups with central language and common tongue for neighbours around about ... as you can see there are many.

The article acknowledges that a few specific areas (more toward the PNG and Torres Strait) are more hierarchical but the thrust is clear, few exceptions aside, the bulk were not.

> pre-historic humans

Aboriginal social groups have long oral histories and a number maintained upkeep on some of the oldest rock art known on the planet .. and groups such as the Pintupi Nine that made first contact with "modern civilisation" in the mid 1980s are certainly not "pre-historic" as we have video, interviews, their artwork, etc.

> like what agriculture would end up supporting.

Quasi nomadic "hunter gather" groups have a regular circuit and a deep knowledge of the animals and plants in that area which they tend to in decisive knowlege based manner - it's not "agriculture" as European grain harvesters for winter storage may know it, but it is absolutely agriculture in the sense of tending to plants in order to eat from them and use their products (and the animals that rely upon them) in later seasons and years to come.

[1] https://mgnsw.org.au/wp-content/uploads/2019/01/map_col_high...

(oops - map added!)