Migration occurs in response to some definitive cause because men tend to migrate in response to a rational impulse which is also, of neccessity, powerful enough to break the yoke that binds men to specific localities.
Excerpt from: E. Marvin Goodwin, Black Migration In America From 1915 to 1960: An Uneasy Exodus, Wales: The Edwin Mellen Press, Ltd., 1990: p. 22.
In geography, the terms used to describe or analyze migration are "push factors" and "pull factors."
© Illinois State Museum 31-Dec-96