 The fable is one of the most enduring forms of folk literature, spread abroad, modern researchers agree, less by literary anthologies than by oral transmission.Fables can be found in the literature of almost every country.The varying corpus denoted "Aesopica" or "Aesop's Fables" includes most of the best-known western fables, which are attributed to the legendary Aesop, supposed to have been a slave in ancient Greece around 550 BCE.