1540s, “want of intelligence,” from Latin stupiditas, from stupidus (see stupid). It also at various times meant “lack of feeling or emotion” (1560s); “stupor; numbness” (c.1600)
The word stupidity does not have very old roots. It comes from around the year 1540, from the Latin word stupiditas meaning “want of intelligence”, which comes from stupidus meaning “stupid”. In the 1560s, stupidity meant “lack of feeling or emotion” and in the 1600s it meant “stupor” or “numbness”.
People use the word stupidity when referring to an action or behavior that is not sensible. Often, stupidity is used as a form of humor. Other times, examples of stupidity are used to teach lessons to others. Observing and commenting on or mocking the stupidity of others is also a way that some people increase their self-esteem. In all these cases, stupidity is useful, although it can be harmful.
“Think of how stupid the average person is, and realize half of them are stupider than that.” -George Carlin