Aesop is considered the initiator of the fable as a literary form written.
These short pieces, usually with characters who are personified animals, with the explicit purpose of communicating a moral. Many of these tales are so famous that they have acquired in modern culture as saying; Some examples are the Fox and the grapes, the Grasshopper and the Ants. Many were also adapted from great writers of fairy tales (e.g. Phaedrus or Jean de La Fontaine).
Aesop's Fables have primarily didactic and educational purpose. This means that, in the narratives, we are continuously inspired by situations practical teaching, especially against the backdrop of a moral deterrent that is reflected on the physicality and the emotions of the characters. The exempla of Aesop are masterly in their smallness, reflect in elementary situations, all the characteristics of real life. The deception, the truth, the appearance, the foolishness and cunning: these characteristics are frequently abstract in Aesop, but all in correlation with the moral final, with an educational purpose.