Migration
Migration is a System Equalization where living beings move to an area with greater resources from an area with less resources.
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This stops when the ratio of living beings to resources equalizes.
For example Venezuela had a lot of the population migrate with people leaving the country due to difficult economic times. This meant there were more resources for those people who were left and the migration has slowed down and conditions improved. Not saying that it was easy.
See Arbitrage .