Brain drain  - Emigration of trained and talented individuals from the country of origin to another country resulting in a depletion of skills resources in the former., Assimilation - Adaptation of one ethnic or social group – usually a minority – to another., Stateless person - Someone who, under national laws, does not enjoy citizenship or nationality, Refugee - a person who has been forced to, or feels forced to (impelled), leave their country in order to escape war, persecution, or natural disaster,

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