“People are born, live and die where God had them born”. This statement from the past has often been put forward in a variety of forms, associated with images of people and objects circulating in a confined radius. This point of view, largely accepted until the late 20th century, turns out to be wholly incorrect and we must consider that goods have circulated over long distances since the dawn of time. A perfect illustration of this is the circulation of obsidian in the pre-historic age. This conclusion, which matured at the end of the 20th century, is no longer a matter of debate. Economic models have been elaborated on this subject, generating lively discussions on which we can now provide a report.