Book excerpt: Produced as a partnership between the American Psychiatric Association and the National Institute of Mental Health, the National Institute on Alcohol Abuse and Alcoholism and the National Institute on Drug Abuse, this thought-provoking collection of white papers: Examines nomenclature issues. Reviews genetic, brain imaging, postmortem, and animal model research and includes strategic insights for a new research agenda Outlines recent progress in developmental neuroscience, genetics, psychology, psychopathology, and epidemiology, focusing on the turbulent first two decades of life. Suggests a research agenda for personality disorders that uses a dimensional rather than the current categorical approach to diagnosis. Proposes a research agenda to evaluate the clinical utility and validity of adding relational disorders to DSM-IV. Reevaluates the relationship between mental disorders and disability, proposing that diagnosis and disability be uncoupled. Examines the importance of culture in psychopathology and the main cultural variables at play in the diagnostic process.