The history of psychoanalysis since Freud has been marked by fragmentation into multiple theoretical schools, often with limited dialogue across them. M. Nasir Ilahi, LLM, LP’s paper examines the deeper reasons for such failures of communication—focusing on schools that originate across transatlantic traditions, specifically the US and the UK. It proposes that these failures cannot be explained solely in terms of intellectual divergence, but must also be understood in relation to “internalized psychoanalytic cultures”—the non-conscious cultural value systems that shape the development, reception, and practice of analytic theories within a given geographical culture. Focusing on the reception of D.W. Winnicott’s “The Use of an Object” paper at NYPSI in 1968, Ilahi illustrates how a lack of awareness of differing underlying cultural frameworks and implicit worldviews—especially between British Object Relations theory and American Ego Psychology—obstructed meaningful dialogue despite a shared professional language on the surface. Whereas British approaches emphasize the preverbal mind, unconscious phantasy, and early object relations, American ego psychology privileged adaptation, verbal processes, and later developmental stages. These transatlantic confusions continue to the present day, as will be briefly illustrated by the case of Thomas Ogden, where despite an explicit affinity at the level of theoretical statements, clinical work remains firmly—and unknowingly—rooted in North American traditions. These divergences demonstrate that theories in psychoanalysis migrate unevenly across cultural contexts, often undergoing unconscious transformations. While recognizing the influence of such internalized cultures—rather than assuming universal agreement on psychoanalytic concepts—may create anxieties that our theories are not free of local values (and thus not totally “scientific”), it nevertheless offers a way forward for more genuine dialogue across schools and geographies, helping to differentiate what is regional versus universal in our theories. The paper argues that without acknowledging the cultural and non-conscious foundations of theoretical orientations, psychoanalysis risks perpetuating confusion, false consensus, and seriously missed opportunities for growth and global relevance.