In Dr. Jekyll and Mr. Hyde what would be the best way to explain the dual personality that makes up the largest part of the book?
A good and interesting question. I'd say that the Dr. Jekyll represents that socially acceptable personality. He is who Jekyll was raised to be. Hyde, by contrast, represents the side, not just of Jekyll but of humanity, that is denied. This means evil, of course, but it also means rude behavior, and simply animal behavior, without the restraints of civilization.