By the way, the idea that biodiversity is cultivated and nature "preserved" by a "hands off" approach where humans just leave a land wild and abandoned is false. Indigenous groups around the world took active roles in their ecologies, increasing biodiversity and productiveness in the lands they were part of. This happened so consistently that in some regions of so-called North America the presence of heightened biodiversity is a consistent indicator of an Indigenous dig site nearby. The land management technology and practices of these groups perfected were so effective, the increased biodiversity persists many centuries afterward.