1946- 20thcentury 21stcentury 304 325 900 australia caste colonies colonization culturalassimilation decolonization donald economicaspects educationandstate elite(socialsciences) emigrationandimmigration ethnicrelations governmentpolicy history illegalaliens immigrants immigrationenforcement india israel languagepolicy modern politicsandgovernment postcolonialism refugees socialaspects socialconditions spain trump unitedstates xenophobia