What is justice? Questions of justice are questions about what people are due, but what that means in practice depends on context. Depending on context, the formal question of what people are due is answered by principles of desert, reciprocity, equality, or need. Justice, thus, is a constellation of elements that exhibit a degree of integration and unity, but the integrity of justice is limited, in a way that is akin to the integrity of a neighborhood rather than that of a building. A theory of justice is a map of that neighborhood.

The issue of social welfare and individual responsibility has become a topic of international public debate in recent years as politicians around the world now question the legitimacy of state-funded welfare systems. David Schmidtz and Robert Goodin debate the ethical merits of individual versus collective responsibility for welfare. David Schmidtz argues that social welfare policy should prepare people for responsible adulthood rather than try to make that unnecessary. Robert Goodin argues against the individualization of welfare policy and expounds the virtues of collective responsibility.