This vision is both illuminating and in many ways hugely inspiring. And yet if we are trying to wrestie with injustices in the world in which we live, with a combination of institutional lacunae and behavioural inadequacies, we also have to think about how insti¬tutions should be set up here and now, to advance justice through enhancing the liberties and freedoms and well-being of people who live today and will be gone tomorrow. And this is exactly where a realistic reading of behavioural norms and regularities becomes important for the choice of institutions and the pursuit of justice. Demanding more from behaviour today than could be expected to be fulfilled would not be a good way of advancing the cause of justice. This basic realization must play a part in the way we think about justice and injustice today, and it will figure in the constructive work that follows in the rest of the book.