The housing pattern pictured above is not sustainable, nor is how we as a species consume the planet’s resources. A way to think about our sustainability is to think of it as an annual budget and by August we’ve already consumed our annual supply of renewable resources, meaning the rest of the year is over budget and we have to consume non-renewable resources. A way to reduce our carbon footprint to help us survive the ongoing climate crisis is to move people into urban centres and depopulate large swaths of the planet. By leaving large open areas for nature to thrive we can help the planet deal with the 8 billion people consuming all of its resoruces.
So emptying half the Earth of its humans wouldn’t have to be imposed: it’s happening anyway. It would be more a matter of managing how we made the move, and what kind of arrangement we left behind. One important factor here would be to avoid extremes and absolutes of definition and practice, and any sense of idealistic purity. We are mongrel creatures on a mongrel planet, and we have to be flexible to survive. So these emptied landscapes should not be called wilderness. Wilderness is a good idea in certain contexts, but these emptied lands would be working landscapes, commons perhaps, where pasturage and agriculture might still have a place. All those people in cities still need to eat, and food production requires land. Even if we start growing food in vats, the feedstocks for those vats will come from the land. These mostly depopulated landscapes would be given over to new kinds of agriculture and pasturage, kinds that include habitat corridors where our fellow creatures can get around without being stopped by fences or killed by trains.
This vision is one possible format for our survival on this planet. They will have to be green cities, sure. We will have to have decarbonised transport and energy production, white roofs, gardens in every empty lot, full-capture recycling, and all the rest of the technologies of sustainability we are already developing. That includes technologies we call law and justice – the system software, so to speak. Yes, justice: robust women’s rights stabilise families and population. Income adequacy and progressive taxation keep the poorest and richest from damaging the biosphere in the ways that extreme poverty or wealth do. Peace, justice, equality and the rule of law are all necessary survival strategies.