"Psychopathic inferiority" is a term that will be new to most readers. However, not only is the name new, but the content of the term also presents a new system of nervous and psychological anomalies, which Koch attempts to delineate as an independent area within psychiatry and neurology. Under the term psychopathic inferiority, he encompasses all psychological irregularities that influence a person's personal life, whether they are congenital or acquired, which do not constitute mental illness even in severe cases. These irregularities prevent the affected individuals from appearing, even in the best circumstances, as being in full possession of mental normality and capability.