You see, the science of phrenology is crucial to understanding the separation about two species. In the skull of the African here, the area associated with submissiveness is larger than any human or other sub-human species on planet Earth. If you examine this piece of skull here, you'll notice three distinct dimples. Here, here and here. Now if I was holding a skull of a ... of an Isaac Newton or Galileo, these three dimples would be in the area of the skull most associated with creativity. But this is the skull of old Ben, and in the skull of old Ben unburdened by genius, these three dimples exist in the area of the skull most associated with servility.
Django Unchained (Calvin Candie)