->''The realm of fairy-story is wide and deep and high and filled with many things: all manner of beasts and birds are found there; shoreless seas and stars uncounted; beauty that is an enchantment, and an ever-present peril; both joy and sorrow as sharp as swords. In that realm a man may, perhaps, count himself fortunate to have wandered, but its very richness and strangeness tie the tongue of a traveller who would report them. And while he is there it is dangerous for him to ask too many questions, lest the gates should be shut and the keys be lost.''

'''''On Fairy-Stories''''' is a lecture, later an essay, by Creator/JRRTolkien, which treated of literary criticism of the FairyTale and {{Fantasy}}, genres not entirely distinct in his day. He takes the "Color Fairy Book" collections of Creator/AndrewLang as his starting point, and offers illuminating observations that served as significant {{Trope Codifier}}s both for the fantasy/fairy tale genres and for [[Franchise/TolkiensLegendarium his own legendarium]].

!! Tropes discussed:
* AllJustADream: According to Tolkien, this device automatically disqualifies any story that uses it from consideration as a FairyTale. Even an otherwise good story is like "a good picture in a disfiguring frame."
* BeastFable: If there's no other magic involved, the mere presence of {{Talking Animal}}s doesn't make a story a FairyTale either.
* {{Escapism}}: Tolkien spends much time defending the legitimacy of escapist fiction, as at the time this mode of storytelling was widely ridiculed and derided by critics.
* FairyTale
* TheFairFolk: discussed at length naturally and compared to "cute" fairies.
** One example given is the J.M. Barrie play ''Mary Rose'' in which humans are meddled with by Fair Folk who are never actually seen (see [[https://en.wikipedia.org/wiki/Mary_Rose_(play) the play's entry]] at Website/{{Wikipedia}} for a fuller description). Tolkien seems to have liked the play reasonably, but thought it uncommonly creepy--and he thought it was ''fun'' to write stories about [[EvilOverlord Evil Overlords]] in [[{{Mordor}} hellish countries]]. He noted though that what made it work is that it was written in a way that did not require special effects.
* HeinzHybrid: He mentions this, and notes that it can lead to unimpressive results if [[HybridOverkillAvoidance overdone]].
* ImmortalitySeeker: Discussed with an interesting PerspectiveFlip:
--> "And lastly there is the oldest and deepest desire, the Great Escape: the Escape from Death. Fairy-stories provide many examples and modes of this Fairy-stories are made by men not by fairies. The Human-stories of the elves are doubtless full of the Escape from Deathlessness."
* LandOfFaerie: Tolkien draws a significant distinction between tales about the Land of Faerie (what he means by "Fairy-stories") and stories about the cute little "fairies" of pop culture (of which he takes a very dim view).
* {{Mythopoeia}}: Described by Tolkien as "sub-creation."
* SpecialEffectFailure[[invoked]]: One problem with the dramatic presentation of fantasy. Part of his definition of Elves as idealized artists ("sub-creators") involves pointing out that this ''doesn't happen'' in the art they are rumored to produce.
* WhatDoYouMeanItsNotForKids[[invoked]]: discussed with particular vigor.