Movement from place to place has been an integral part of humanity's interaction with the environment for hundreds of thousands of years. In fact, until the time of the agricultural revolution, migration was an almost daily occurrence. The search for more and better resources, freedom from war and conflict, and religious and ideological toleration have been contributing factors working to encourage migration. Both group and individual movements have shaped and structured societies, cultures, and landscapes. It is through migratory motions, departures from the old and movements toward the new, that humans diverge and change, culturally, socially, mentally, and technologically. There are few aspects of the fabric of the modern world that have not been deeply affected by the history of migration.
