Why are civilizations or nation-cultures suspicious of outside influences?

How were returning african-american soldiers treated in american cities in 1919–1920?

If the united states became a "majority-minority” nation, o whites would be the majority, but there would still be ethnic minorities. there would be an equal number of whites and ethnic minorities. othere would be more ethnic minorities in the population than whites. o no one would be considered white or part of an ethnic minority group.

The belief that war often drives civil modifications to a society is based upon the evidence that in times of external conflict, a society is forced to abandon long held discriminatory values to: