Health inequalities are embedded in a complex array of social, political, and economic inequalities. Responding to health inequalities will require systematic action targeting all the underlying (“upstream”) social determinants that powerfully affect health and well‐being. Systemic inequalities are a major reason for the rise of modern populism that has deeply divided polities and infected politics, perhaps nowhere more so than in the United States. Concerted action to mitigate shocking levels of inequality could be a powerful antidote to nationalist populism. A (...) basic yet critical start to addressing health inequalities is to recognize them, which demands improving data collection and analysis. Certainly, global indicators show vast progress in reducing poverty and extending life. Yet aggregate health data mask a deeper reality: health gains have disproportionately benefited the well‐off, leaving the poor and middle‐class behind. (shrink)