Thomas and Sillen have attempted an important, worthy task: to document the evidence of racial bias in research investigators, psychodynamic formulations, sexual myths about Blacks, criteria for patient selection in the delivery of mental health services, epidemiologic surveys, and the assessment of psychopathologic deficits consequent to oppression. I learned much from the authors about the political manipulations in the United States Government Census of 1840, the history of the origin of the word 'miscegenation', the historical context of the Jensen assertions about