What is a just way of spending public resources for health and health care? Several significant answers to this question are under debate. Public spending could aim to promote greater equality in health, for example, or maximize the health of the population, or provide the worst off with the best possible health. Another approach is to aim for each person to have "enough" so that her health or access to health care does not fall under a critical level. This latter approach is called sufficientarian. Sufficientarian approaches to distributive justice are intuitively appealing, but require further analysis and assessment. What exactly is sufficiency? Why do we need it? What does it imply for the just distribution of health or healthcare? This volume offers fresh perspectives on these critical questions. Philosophers, bioethicists, health policy-makers, and health economists investigate sufficiency and its application to health and health care in fifteen original contributions.