Charlie and the Chocolate Factory, has a big problem in the Oompa Loompas. The characters, which were depicted in early editions as African pygmies, are portrayed as happy slaves, content to leave their native land behind and toil in a factory. Especially for children who are descendants of slaves, such messages can have a pernicious effect on how they interpret their value in the world.
http://time.com/4876091/racism-child...ooks-kids-lit/