Sigmund Freud investigates the surprising psychological parallels between primitive societies and neurotics, focusing on the universal dread of incest, the system of totemism, and the intricate network of tribal taboos. He begins by examining the aborigines of Australia, noting their intense abhorrence of incest and how the totemic system serves as a social and religious barrier against it, replacing blood relationships with clan obligations. These severe prohibitions, mirrored in the avoidance customs practiced among various cultures regarding near relatives and mothers-in-law, reveal a profound ambivalence of emotion where tenderness constantly struggles with unconscious hostility.
Transitioning to the concept of taboo, Freud compares Polynesian restrictions with the compulsive prohibitions observed in neurotics suffering from touching phobias. Both domains exhibit unmotivated commandments, an inner compulsive need, and a high capacity for displacement and contagion. By analyzing the treatment of enemies, rulers, and the dead, Freud demonstrates how taboo customs and rituals function as compromise formations, simultaneously expressing grief, mourning, and a repressed hostility toward the deceased. This ambivalence forms the core of the psychological mechanism known as projection, wherein unconscious aggressive impulses are attributed outward onto demons and spirits.
Freud then traces the development of animism, magic, and the omnipotence of thought, linking these early cognitive stages to human narcism. Primitive man overvalues his psychic processes, believing his thoughts and wishes can directly alter reality, much like a compulsion neurotic or a child. This animistic worldview represents humanity's first comprehensive attempt to explain and master the universe before the emergence of religious and scientific systems.
In the final major section, Freud addresses the origin of totemism and its connection to the Oedipus complex. Drawing upon Charles Darwin's hypothesis of the primal horde and Robertson Smith's analysis of ancient sacrificial feasts, he proposes a dramatic historical reconstruction. The totemic system and its foundational prohibitions—not to kill the totem animal and not to marry within the clan—originated from the collective remorse of brothers who banded together to slay and devour the jealous primal father. This parricide inaugurated social organization, morality, and religion as acts of subsequent obedience and expiation.
Concluding with an exploration of later religious evolutions, Freud demonstrates how the ambivalent father complex persists through animal sacrifices, theanthropic hero myths, and Christian communion. He suggests that the foundational elements of religion, ethics, society, and art all meet in the Oedipus complex, offering a unifying psychological framework for understanding the deep historical continuity of human culture and neurosis.