Psychopathy, from psych (soul or mind) and pathy (suffering or disease), was coined by German
psychiatrists in the 19th century and originally just meant what would today be called
mental disorder, the study of which is still known as
psychopathology. By the turn of the century 'psychopathic inferiority' referred to the type of mental disorder that might now be termed
personality disorder, along with a wide variety of other conditions now otherwise classified. Through the early 20th century this and other terms such as 'constitutional (inborn) psychopaths' or 'psychopathic personalities', were used very broadly to cover anyone who violated legal or moral expectations or was considered inherently socially undesirable in some way.