The blue-collar workers who nixon called “the silent majority”
fled to the suburbs to avoid integration
wanted to replace existing social institutions with cooperatives
opposed the war in vietnam
believed their opinions were overlooked in the political process

believed their opinions were overlooked in the political process

Explanation:

Generally speaking, a silent majority would be a considerably large group of people inside a country that has as a characteristic not expressing their opinions. Richard Nixon was the one who made this term more popular by using it in a speech in 1969.  "And so tonight—to you, the great silent majority of my fellow Americans—I ask for your support."