Health disparities have remained stubbornly entrenched in the American health care system¿and in Just Medicine Dayna Bowen Matthew finds that they principally arise from unconscious racial and ethnic biases held by physicians, institutional providers, and their patients.Implicit bias is the single most important determinant of health and health care disparities. Because we have missed this fact, the money we spend on training providers to become culturally competent, expanding wellness education programs and community health centers, and even expanding access to health insurance will have only a modest effect on reducing health disparities. We will continue to utterly fail in the effort to eradicate health disparities unless we enact strong, evidence-based legal remedies that accurately address implicit and unintentional forms of discrimination, to replace the weak, tepid, and largely irrelevant legal remedies currently available.Our continued failure to fashion an effective response that purges the effects of implicit bias from American health care, Matthew argues, is unjust and morally untenable. In a time when the health of the entire nation is at risk, it is essential to confront the issues keeping the health care system from providing equal treatment to all.