The Boy Who Cried Wolf
The Boy Who Cried Wolf is one of Aesop's Fables,  numbered 210 in the Perry Index. From it is derived the English idiom "to cry wolf", defined as "to give a false alarm" in Brewer's Dictionary of Phrase and Fable and glossed by the Oxford English Dictionary as meaning to make false claims, with the result that subsequent true claims are disbelieved.
The tale concerns a shepherd boy who repeatedly tricks nearby villagers into thinking a wolf is attacking his flock. When one actually does appear and the boy again calls for help, the villagers believe that it is another false alarm and the sheep are eaten by the wolf. 
The moral stated at the end of the Greek version is, "this shows how liars are rewarded: even if they tell the truth, no one believes them". It echoes a statement attributed to Aristotle by Diogenes Laërtius in his The Lives and Opinions of Eminent Philosophers, where the sage was asked what those who tell lies gain by it and he answered "that when they speak truth they are not believed". William Caxton similarly closes his version with the remark that "men bileve not lyghtly hym whiche is knowen for a lyer".
The story dates from Classical times, but, since it was recorded only in Greek and not translated into Latin until the 15th century, it only began to gain currency after it appeared in Heinrich Steinhowel's collection of the fables and so spread through the rest of Europe. For this reason, there was no agreed title for the story. Caxton titles it "Of the child whiche kepte the sheep" (1484), Hieronymus Osius "The boy who lied" ("De mendace puero", 1574), Francis Barlow "Of the herd boy and the farmers" ("De pastoris puero et agricolis", 1687), Roger L'Estrange "A boy and false alarms" (1692), and George Fyler Townsend "The shepherd boy and the wolf" (1867). It was under the final title that Edward Hughes set it as the first of ten "Songs from Aesop's fables" for children's voices and piano, in a poetic version by Peter Westmore (1965).
Teachers have used the fable as a cautionary tale about telling the truth but a recent educational experiment suggested that reading "The Boy Who Cried Wolf" increased children's likelihood of lying. On the other hand, reading a book on George Washington and the cherry tree decreased this likelihood dramatically. The suggestibility and favourable outcome of the behaviour described, therefore, seems the key to moral instruction of the young. However, when dealing with the moral behaviour of adults, Samuel Croxall asks, referencing political alarmism, "when we are alarmed with imaginary dangers in respect of the public, till the cry grows quite stale and threadbare, how can it be expected we should know when to guard ourselves against real ones?"
- King You of Zhou – His folly fooled the nobles repeatedly so they would not rescue him in a real danger.
- "Marge Gets a Job" – An episode of the TV series The Simpsons which includes this story as a plot element.
- The Boy Who Cried Wolf. ISBN 9781869612771.
- The Concise Dictionary...(Cassel Publications 1992)
- "wolf". Compact Oxford English Dictionary. askoxford.com. OUP. June 2005. Retrieved 19 September 2007.
- The Moral Class-book. 1839.
- Original version from mythfolklore
- Translated by C. D. Yonge: Section XI (apophthegms) of the life of Aristotle
- "Of the child whiche kepte the sheep" at mythfolklore.net
- Po Bronson and Ashley Merriman, New York 2009. Nurture Shock – New Thinking about Children. pp. 83–84. ISBN 978-0-446-50412-6.
- The Fables of Aesop, Fable CLV; available on Google Books, p. 263
Works related to The Boy Who Cried Wolf at Wikisource
- Laura Gibbs' gallery of 15th–20th century book illustrations of the fable