Dwelling on Earth – Jay Griffiths
Emergence Magazine Podcast
The Evolution of Rome's Soil
More than an inch per century vanished. If the topsoil had been between six inches and a foot deep, then it would have taken almost a thousand years for the Roman heartland to lose its topsoil. Repeatedly, civilizations have died because they have not looked after the soil on which they depended. Early Mayan culture included slash and burn agriculture where people would use the land for its brief fertility and then move on to another area. But when the great Mayan cities were built, people stayed in one place and began farming the land to exhaustion.
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