For over a decade, Gammage has examined written and visual records of the Australian landscape. He has uncovered an extraordinarily complex system of land management using fire and the life cycles of native plants to ensure plentiful wildlife and plant foods throughout the year. The Biggest Estate on Earth rewrites the history of this continent, with huge implications for us today. Once Aboriginal people were no longer able to tend their country, it became overgrown and vulnerable to the hugely damaging bushfires we now experience. And what we think of as virgin bush in a national park is nothing of the kind.