As time passes, man acquires a better understanding of its own dual nature through the advancement of medical science and psychology. However in 1886, Stevenson was far beyond his years in his depiction of man’s dual nature in his story …show more content…
Professor of psychiatry at Harvard Medical School, MD, Gary Sachs states, “The average dissociative patient will be depressed more often than manic; however, not all patients who are diagnosed with some sort of mental disassociation are affected with such vast changes in personality” (Dissociative Identity Disorder). In the case of Jekyll the personality changes were extreme, yet often in reality the changes are incognito and only are discovered until the disease progresses out of control. From the concluding chapter, it can be inferred that Jekyll has been struggling with his dual nature for years, and that his use of this mysterious serum was his last