Egoistic is characterized by complete isolation from others.
It identifies three basic types of the titular phenomenon.   Altruistic, which results from excessive concern for the social good, appears in Japan and among the Inuit.  Egoistic is characterized by complete isolation from others. Anomic, which is common in modern societies, results from an inability to accept limitation that develops from continual demand for progress.  An example is stockbrokers killing themselves after market crashes.  All of these types are analyzed in FTP this 1897 book by Emile Durkheim.
It identifies three basic types of the titular phenomenon.   
(Le) Suicide