The script was developed during filming by the director and the actors in consultation with medical and behavioral sciences expertise.
In the Swedish sociopath investigation "Suggestions regarding organization for sociopaths" published 1968, was written: "A sociopath has a short-term perspective, is a latent and manifest danger to society and is prone to impulsive and unpremeditated actions, and suffers from a lack of spontaneous job satisfaction." In a comment, filmmaker Forsberg said that "according to this definition, most of society's greatest talents could at various times be described as sociopaths".