Do Folktales Evolve Like Biological Species?

What Little Red Riding Hood teaches us about the spread of folklore around the world.
Gustave Dore 

We all know the story: Once upon a time there was a young girl who took a walk through the woods to visit her grandmother, carrying a basket of goodies. When she arrived she found her granny ill in bed.

But something else was wrong.

Why did Granny’s eyes look so big?! And her ears?! And her teeth?! By the time the girl finally realized that “Granny” was, in fact, a wolf in disguise, it was too late—she was gobbled up in an instant. And that was the end of Little Red Riding Hood. 

Or was it? Maybe the story you know has the little girl rescued by a passing huntsman, who cuts her out of the wolf’s belly and kills the beast. Or perhaps her father stormed in with a shotgun, and blew the wolf’s head off just as he was about to devour her. In French and Italian oral tradition, the girl doesn’t need any man to rescue hershe uses her own wits to escape from the wolf. (Interestingly, this more empowered heroine has been reincarnated in some modern versions of the tale, such as Angela Carter’s Company of Wolves, David Slade’s superb Hitchcockian fairy-tale movie Hard Candy and the recent Hollywood flop Red Riding Hood).

Like all folktales, there is no single “correct” version of Little Red Riding Hood. Although the basic structure of the story remains recognizable, many of the details of the plot and characters have been modified as they get passed on from person to person. We can think of it as being like a game of “Broken Telephone,” whereby as people learn and re-tell the tale they omit some elements, while adding and distorting others.

In folklore, this game is not only played vertically across generations, but horizontally across space as tales spread from society to society, with some—like Little Red Riding Hood—spreading globally. Over time, these so-called “international tale types” evolve into locally distinctive forms (known as oikotypes) as they adapt to different cultural and ecological contexts. This process is directly analogous to the emergence of new species in biological evolution and, I argue, can be studied using the same kinds of tools.

The idea is to use a biologist’s tool, like phylogenetic analysis which looks at genetic relationships among species, to investigate the evolution of folktales. This is because folktales not only evolve through similar processes as biological species (variation, selection and inheritance), but the problems of reconstructing them are also comparable. Just as the fossil record bears witness to a tiny proportion of extinct ancestral species, the literary record provides scarce textual evidence about early forms of folktales because they have been mainly transmitted through oral means. Phylogenetics can fill these gaps by using information about the past that has been preserved through the mechanism of inheritance.

Gustave Dore

Take the example of the long-running debate about the relationship between Little Red Riding Hood and similar tales from other regions of the world. These include East Asian tales in which a group of sisters are home alone when they hear a knock at the door. It is a tiger (or leopard, or some other predator) disguised as their grandmother. Despite her suspicious appearance (“Granny, why are your eyes so big?!”) they let her in. That night they share a bed, and the tiger eats the youngest girl to the horror of her sisters, who manage to escape.

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