We humans are creatures of habit. We favor routines, the familiar, the safe. Before it breeds contempt, familiarity breeds comfort. When we shop in the physical world, we favor a single commercial venue where many things can be found. This is not by accident–it costs more in resources for even the least technologically-advanced society to have to accumulate resources from multiple locations than it does from a single or few locations. Whether it's a fertile watering hole or a bazaar or souk c...