As a consequence of hundreds of years of colonisation, globalisation and never-ending economic extraction we have remade the world from the scale of the cell to the tectonic plate. But what if we radically reversed this planetary sprawl and retreated from our vast network of cities into one hyper-dense metropolis housing the entire population of the earth? 'Planet City' explores the productive potential of extreme densification, where 10 billion people surrender the rest of the planet to a global wilderness.