Group Psychology and The Analysis of The Ego is a scientific exploration of the interplay between individual psychology and group dynamics. Freud investigates how group settings influence personal behaviors, instincts, and identity, emphasizing the unconscious processes that arise in collective environments. He examines how group membership can intensify emotions, reduce intellectual capacity, and shape individual traits. Freud contrasts individual psychology with group psychology, arguing that while personal characteristics are important, they are often shaped by social interactions. His analysis delves into how individuals are influenced by the collective mentality of groups, with a focus on the mechanisms of suggestion and emotional bonds. Freud further explores the concept of the primal horde, offering insights into how group behavior is governed by libidinal ties and the unconscious mind. This work provides a foundational understanding of how individuals are transformed when part of a group, highlighting the psychological forces at play within collective environments.