The twelve essays in this collection address questions about justice and social institutions designed to secure it. Some explore the relationship between justice and equality, asking whether societies should strive to eliminate inequalities in their citizens' levels of opportunity or welfare. Some consider whether societies are obligated to provide their less fortunate citizens with some minimum level of subsistence, or whether the provision of such relief is best left to private charitable organisations. Some essays look at the relationship between justice and other values, such as mutual consent, the protection of property rights, or the elimination of exploitation. Others deal with the rules governing specific practices, such as the distribution of health care, the pursuit of academic inquiry and research, or the assignment of punishments. Still others propose and defend principles for designing and evaluating social institutions.