Weak willpower & procrastination caused by dopamine hypofunction is one of those neurological deficiencies which effort alone can't overcome. Happily, in our transhuman paradise, even the most lethargic spirit can move mountains.
Self...lost, overtaken, evil-driven, powerless. 1900s, Age of Anxiety, discovers the Doppelgänger, Ghosts, Vampires, Werewolves, endowed with potent psychological & sexual connotations, bring insanity & hysteria into focus.