Sociopath
A sociopath was someone exhibiting sociopathy, a casual disregard for the concerns of others.

Lon Suder was considered a sociopath. ()

Iko, a Nygean, was prone to sociopathic behavior. This was the result of a birth defect, causing a part of his brain (analogous to the Human pineal gland) to be detached from the rest. ()

See also
Psychopath

External link

Psychological conditions
Societal classifications