The general point that a political theory is, among other things, a partisan intervention, is well taken. So question about the actual political impl… - Raymond Geuss

When we use a tool in everyday life, it usually remains a detached instrument under my control and activated only when, where, and how I decide. … In contrast, conceptual innovations often “stick,” escape our control and become part of reality itself. Once Hobbes invents the idea of the “state” this idea can come into contact with real social forces with unforeseeable results. The “tool” develops a life of its own, and can become an inextricable part of the fabric of life itself.

One obvious way to specify what it is that is “due” to someone is to appeal to existing legal codes, but what they will prescribe will vary enormously from one time and place to another. A second account of justice might appeal to some notion of merit or desert. The third approach is Aristotle’s “general” conception, which simply identified “justice” with the sum of all the virtues and excellences. A fourth conception of justice is the idea that justice is in some way to be connected to equality of shares, resources, or outcomes. Finally there is the idea of fairness or impartiality of procedure. One might think that Rawls’s view derives some of its apparent plausibility because of a gradual slide between the various senses of “justice.” People start from a vague intuition that justice as a “general” concept (in the third sense above) is extremely important for the proper functioning of a society; they then find it easy to shift from this to a particular conception that connects “justice” with fairness of procedure and (a certain kind of limited) equality.

If the basic assumption of the theory of ideology is at all tenable, namely, that the general power relations embodied in our social structures can exert a distorting influence on the formation of our beliefs and preferences without our being aware of it, then we are definitely not going to put that kind of influence out of action by asking the agents in the society to imagine that they didn’t know their position. To think otherwise is to believe in magic: imagine you are “impartial” and you will be. In fact, doing that will be more likely to reinforce the power of these entrenched prejudices because it will explicitly present them as universal, warranted by reason, etc.