This paper is from 1993 but still strikes me as very pertinent especially as it contrasts Rawls and Nozick on Justice. It also has a wonderful description of liberals and conservatives - pro and con - that seems to really describe the psychological profiles very well. http://faculty.haas.berkeley.edu/tetlock/Vita/Philip%20Tetlock/Phil%20Tetlock/1992-1993/1993%20Liberal%20and%20Conservative%20Approaches%20to%20Justice.pdf