Migration usually occurs out of a need for survival in some way, or a desire for a better standard of living. how can this type of attitude, present in migrant populations, affect the demographics of a newly settled area?

Cultural assimilation is the process by which a person's or group's culture come to resemble those of another group. The term is used to refer to both individuals and groups; the latter case can refer to either foreign immigrants or native residents that come to be culturally dominated by another society