Offering insight into the history of psychiatric taxonomies in general and the invention of the schizophrenia diagnosis in particular, maps the emergence of uncertainties about the empirical and conceptual status of contemporary diagnostic systems. Particular focus is given to the heterogeneity problem, or the problem of wide empirical variation within and between disorder categories. At the heart of this book are interviews with mental health service users with psychotic-disorder diagnoses in New York City and Jerusalem. Through a detailed portrait of their existential and socio-institutional worlds, the book unveils a way of being-in-the-world characterized by the experience of feeling profoundly vulnerable and unsafe in an inhospitable world as well as foreclosed from belonging to one or more human communities. As this psychological portrait of unfolds, the reader becomes slowly aware of the relationships between psychotic experiences – often thought to be bizarre or ‘un-understandable’ – and the timeless ways in which all humans seek to dwell in the world. Making an important contribution to the phenomenological-existential literature on psychosis, and demonstrating interdisciplinary and transcultural approaches to understanding anomalous experiences, this volume will be of great interest to researchers and scholars of transcultural psychiatry, clinical psychology, and critical theory.