https://en.wikipedia.org/wiki/Silent_majority
The silent majority is an unspecified large group of people in a country or group who do not express their opinions publicly. The term was popularized by U.S. President Richard Nixon...
Preceding Nixon by half a century, it was employed in 1919 by Calvin Coolidge's campaign for the 1920 presidential nomination. Before that, the phrase was used in the 19th century as a euphemism referring to all the people who have died...