The Protest Psychosis

Metzl focuses on exposing the hospital's history of disproportionately diagnosing African Americans with schizophrenia because of their support for civil rights. He suggests that in part the sudden influx of such diagnoses could be traced to a change in wording in the DSM-II, which compared to the previous edition added "hostility" and "aggression" as signs of the disorder. Metzl writes that this change resulted in structural racism.

The book was well reviewed in JAMA, where it was described as "a fascinating, penetrating book by one of medicine's most exceptional young scholars". The book was also reviewed in the American Journal of Psychiatry, Psychiatric Services, Transcultural Psychiatry, Psychiatric Times, The American Journal of Bioethics, Social History of Medicine, Medical Anthropology Quarterly, Journal of African American History, Journal of Black Psychology, Health: An Interdisciplinary Journal for the Social Study of Health, Illness and Medicine, and The Sixties: A Journal of History, Politics and Culture.