Human Nature Duality in Victorian Literature

This book is based on Robert Louis Stevenson's novella: The Strange Case of Dr. Jekyll and Mr. Hyde, where he showcases human nature duality in a fictional way. "With every day, and from both sides of my intelligence, the moral and the intellectual, I thus drew steadily nearer to the truth, by whose partial discovery I have been doomed to such a dreadful shipwreck: that man is not truly one, but truly two." Stevenson.