Final answer:
The Immigration and Naturalization Act of 1965 revised the quota system to allow entire immigrant families to move to the U.S., leading to increased diversity in the population with significant influxes from Asia and Mexico.
Step-by-step explanation:
The immigration policies in the United States underwent significant changes in the sixties. Influenced by the civil rights movement, the Kennedy and Johnson administrations sought reform. The Immigration and Naturalization Act of 1965 significantly revised the quota system, which had been in place since the 1920s and targeted largely Eastern European and Asian immigrants. This act paved the way for entire immigrant families to move to the United States, dramatically altering the population makeup of the country.
The consequences of these policy changes were profound. There was an increase in immigration from countries that had been previously restricted, leading to new waves of immigrants from Asia and Mexico. This diversification of the American population also meant an influx of more Muslim immigrants and a higher number of educated individuals seeking to escape political unrest and seeking better opportunities.
These changes sparked significant social, political, economic, and cultural readjustments in the U.S. and played a role in shaping the nation's demographic trends toward a more diverse populace.