Deep in an Australian rainforest, surrounded by birds older than any cathedral, We unpack one of the greatest mysteries in human history, how the first people to sail across open seas, 60,000 years ago, became a civilisation that forgot how to sail. The Aboriginal Australians, the oldest continuous culture on Earth, arrived when Europe was still under ice. They built languages older than Latin, mapped deserts the size of continents, and thrived for 99.7% of Australia’s human history before a single European set foot here. Then, in just decades, 90% of them were gone, wiped out not by conquest, but by microbes. From this collision of worlds, we explore what makes societies innovate, why isolation freezes progress while connection multiplies it. Drawing on Harvard anthropologist Joseph Henrich’s idea of the collective brain, they trace how collaboration fuels invention, from the first tools to AI. The episode arcs from the Aboriginal sailors who crossed 100 miles of open water before anyone else, to the Nobel Prize winners studying the alchemy of innovation, and ends with Ireland’s own late awakening from creative isolation.

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