“Baa, Baa, Black Sheep” is an English nursery rhyme, the earliest surviving version of which dates from 1731. The words have not changed very much in two-and-a-half centuries. It is sung to a variant of the 1761 French melody Ah! vous dirai-je, maman. Uncorroborated theories have been advanced to explain the meaning of the rhyme. These include that it is a complaint against Medieval English taxes on wool and that it is about the slave trade. In the twentieth century it was a subject of controversies in debates about political correctness. It has been used in literature and popular culture as a metaphor and allusion. The Roud Folk Song Index classifies the lyrics and their variations as number 4439. Wikipedia
