If you gave me 10 million dollars, I wouldn't live any differently. Although nowadays I guess you'd have to raise that to 20 million to mean anything.
Tasmanian history is a study of human isolation unprecedented except in science fiction - namely, complete isolation from other humans for 10,000 years.
Domesticated plants and animals yield far more calories per acre than do wild habitats, in which most species are inedible to humans.
Until the end of the last Ice Age around 11,000 B.C., all humans on all continents were still living as Stone Age hunter/gatherers.
Australia is the smallest continent, and most of it can support only small human populations because of low rainfall and productivity.