A single ancient continental block made of Australia, Tasmania, and New Guinea. Australia’s interior plateaus and desert basins create extremely low-density, mobile societies tuned to arid ecology, while New Guinea’s towering highlands and wet tropical valleys produce dense, isolated agricultural cultures with deep linguistic fragmentation. The contrast—arid continent + mountainous rainforest island—creates one of Earth’s starkest civilizational divides within one landmass. Geography ensures long-term separation, local autonomy, and unparalleled cultural diversity.
