Genetics strongly suggest Australia was settled by a single broad wave of humans that spread across the continent, finfing their niche, and staying in place whether that be east, west, north south, across desert, coast, rivers, forrest, etc.

This contrasts to earlier "literary" arguments in magazines such as Quadrant that native Australians moved about and fought for territories with invaders supplanting original dwellers long before Europeans arrived.

- https://www.abc.net.au/news/science/2016-09-22/world-first-s...

is a national press article on some of that, my original references to the hosted papers on this seems to be offline / unavailable ATM (damn bitrot).