Describe flaws in an argument (2-4 sentences only)

"The more modern anthropologists learn about Australian Aboriginal civilization, the better they understand its intellectual achievements. Australian Aborigines were not the hunter/gatherers assumed by so many early writers, but rather some western tribes were farmers of indigenous plants and animals. Furthermore, numerous medical uses of these indigenous plants were discovered by the Australian Aborigines. Oral traditions indicate that the Aborigines seem to have had high levels of knowledge of the workings of the inside of the human body, perhaps indicating surgical knowledge."