Yet the prophetic function does not finish with denunciation. A positive, nourishing vision must also be attempted. Hence the sec- ond area where a revitalisation of Liberation Theology and CST may be expected, namely the renewed attempts to formulate principles of cosmopolitan justice. The debate here is inescapably shaped by the work of John Rawls, not only with his magisterial work A Theory of Justice in 1971, but also The Law of Peoples, which was pub- lished in the same year as Amartya Sen’s Development as Freedom – 1999. More recently, Sen has written The Idea of Justice (2009) as an attempt to go beyond the well-rehearsed limitations of Rawls’ ap- proach. The possibility of a cosmopolitan account of global justice, one that is nevertheless respectful of national and local autonomy and identities, is very much a live one. Rawls and Sen seek to iden- tify the conditions for a ‘realistic utopia’, achievable over the next twenty years, An engagement with such an enterprise on the part of liberation theologians would surely fulfil the requirement of a ‘histor- ical project’ that Ivan Petrella insists is necessary for the continued viability of Liberation Theology.