Since time immemorial, people have died from stupidity. Watch any news broadcast showing tourists stepping over protective railings at a zoo to get a closer photo of the nice Bengal Tiger, or youthful (and occasionally geriatric) naked sky-divers hurling themselves out of aeroplanes. Or consider the young couple who've left their two-year-old toddler alone in a room with their new pet Pit Bull Terrier,
With the above in mind, the answer becomes axiomatic.
The problem with the gene pool is that it doesn't come with a lifeguard.
Duty, Honor, Stupidity.
His stupidity led to the accident.It was a moment of stupidity.
The study of stupidity is called monology.
That is the correct spelling of "stupidity" (inanity, foolishness).
"Stupidity and stupid" are nouns. It is not common to turn a noun into a verb - and even then it is not correct practice. I know of no verb form of 'stupidity'.
It can be both, because it depends on what you are comparing 'stupidity' to.
Noun = stupidity Adverb = stupidly Adjective = stupid
In piglatin, "stupidity" would be said as "upiditystay."
the fear of The Bible is stupidity.
That is the correct spelling for "stupidity" and "contagious." (It isn't always.)
the Greek word for Stupidity: is Ηλιθιότητα Pronounced: I̱lithióti̱ta
Stupidity isn't a virus, but it sure is spreading like one.