 It includes the essays ""The Relations between the Ego and the Unconscious"" and ""On the Psychology of the Unconscious"," wherein Jung presented the core of his views about psychology.Historically, they mark the end of Jung's close association with Freud and show his attempt to integrate the work of Freud and Adler into a comprehensive framework.An appendix includes original versions of the essays ""New Paths in Psychology"" (1912) and ""The Structure of the Unconscious"" (1916), (both discovered after Jung's death), to show the development of his thinking in later versions.