I also want to suggest this YouTube lecture on the subject which I’ve enjoyed listening to a couple of times. Dave Montgomery - Dirt: The Erosion of Civilizati

I also want to suggest this YouTube lecture on the subject which I’ve enjoyed listening to a couple of times. Dave Montgomery - Dirt: The Erosion of Civilizations https://youtu.be/sQACN-XiqHU https://youtu.be/sQACN-XiqHU