Move : the forces uprooting us
"In the 60,000 years since people began colonizing the continents, a continuous feature of human civilization has been mobility. History is replete with seismic global events--pandemics and plagues, wars and genocides. Each time, after a great catastrophe, our innate impulse toward physical security compels us to move. The map of humanity isn't settled--not now, not ever. The filled-with-crises 21st century promises to contain the most dangerous...