“…Note, however, that the diversity of ideas about the basic definition of schizophrenia throughout the 20th century cannot be understated—despite the fact that the lack of attention to history in medico-clinical discourse sometimes leads to a kind of collective forgetting once new diagnostic concepts are brought into consensus (see Kuhn, 1962/1996). As the authors of one conceptual history of the diagnosis concluded, “the history of schizophrenia can be best described as the history of a set of research programmes running in parallel rather than serialism and each based on a different concept of disease, of mental symptom and of mind” (Berrios, Luque, & Villagrán, 2003, p. 111; see also Kurtz, 2015; Marsella, 2016; McNally, 2012). Even mid-century psychoanalytic theories about schizophrenia (and psychosis more broadly) were notably diverse, ranging from classic Freudian ideas about a form of primary narcissism in which the libido withdraws from the world and recathects onto the ego (Freud, 1914/1957), to ego psychologists’ supposition of a dissolution in ego boundaries (see Ophir, 2015, for an overview), to Searles’ (e.g., 1965) and Fromm-Reichmann’s (e.g., 1952) interpretations of the life-historical meanings in putatively anomalous behaviors, to Sullivan’s (e.g., 1962) insights about interpersonal etiology, loneliness in particular.…”