@philbetts @phiofx You are right about the learning. The Hawaiian ahupua'a is a good example. The Amazon rain forest possibly being a huge human-guided food forest is another.
Still, we must also be realistic and acknowledge that the large majority of traditional food production methods were not sustainable. They might not destroy their means of production as quickly as modern monoculture, but slow degradation or risk thereof is still not the same as actual sustainability.