Answer:The Immigration and Naturalization Act of 1965
Explanation:
The Immigration and Naturalization Act of 1965, which is also called the Hart-Celler Act( which was sponsored by Sen. Philip Hart (D-Mich.) and Rep. Emanuel Celler (D-N.Y.), hence its name Hart-Celler ) passed by Congress and signed into law by President Lyndon B. Johnson abolished an earlier national origin quota system and enacted a new immigration policy that favored migration chains, favoring children and relatives of US citizen, it also helped to introduce individuals and professionals into the country.
I believe the correct answer is Bacon's Rebellion. It was an event which happened in 1676 when lower classes rebelled against the system in which they were not being treated equally as the upper classes. This was the first rebellion of such nature and it lead to greater democracy in the States.