An injustice is tolerable only when it is necessary to avoid an even greater injustice.

Justice as fairness provides what we want.

The concept of justice I take to be defined, then, by the role of its principles in assigning rights and duties and in defining the appropriate division of social advantages. A conception of justice is an interpretation of this role.

Thus I assume that to each according to his threat advantage is not a conception of justice.

Now the good of political life is a great political good. It is not a secular good specified by a comprehensive doctrine like those of Kant or Mill. You could characterize this political good as the good of free and equal citizens recognizing the duty of civility to one another: the duty to give citizens public reasons for one's political actions.

The good of political life is the good of free and equal citizens recognizing the duty of civility to one another and supporting the institutions of a constitutional regime.

In all sectors of society there should be roughly equal prospects of culture and achievement for everyone similarly motivated and endowed. The expectations of those with the same abilities and aspirations should not be affected by their social class.