Abstract
This paper considers the writings of John Stuart Mill in political philosophy and political economy as a prototype for ideals of a 'sustainable development' grounded in a norm of justice and social solidarity. Mill's conception of a just 'stationary state* of society is examined alongside his attempts to reconcile precepts of non-interference (individual freedom) and private property, with the constraints and obligations of social, economic, and ecological coexistence. It is shown that notwithstanding vaccillations, Mill ends up espousing an ethical norm of reciprocity and solidarity that is quite different from the premise of self-interest axiomatized in most economic models of competitive market economies. These intuitions about a duty of care complementary to the non-interference principle, when systematized, are shown to find a new contemporary application to questions of economic justice and environmental sustainability.