Full Idea
A theory of justice that can serve as the basis of practical reason must include ways of judging how to reduce injustice and advance justice, rather than aiming only at the characterisation of perfectly just societies.
Gist of Idea
Practical justice concerns not only ideals, but ways to achieve them
Source
Amartya Sen (The Idea of Justice [2009], Pref 'What')
Book Reference
Sen, Amartya: 'The Idea of Justice' [Penguin 2010], p.-20
A Reaction
Sounds simple, but this is Amartya Sen's revolutionary new idea - that justice is not just ideals and opportunities, but what sort of life people actually end up with.