“Holmes was charming and gracious, but something about him made Bellknap uneasy. He could not have defined it. Indeed, for the next several decades alienists and their successors would find themselves hard-pressed to describe with any precission what it was about men like Holmes that would cause them to seem warm and intgratiating but also telegraph the vague sense that some important element of humanness was missing. At first alienists described this condition as “moral insanity” and those who exhibited the disorder as “moral imbeciles”. They later adopted the term “psychopath”.
The devil in the White City; murder, magic, and madness at the Fair that changed America