The "Veil of Ignorance" Thought Experiment
Rawls imagined that, to set the most basic principles of justice for a wholly new society, the fairest way would be to suppose the framers temporarily screened by a "veil of ignorance," not knowing whether they would be born into a rich or poor family, whether their talents would be outstanding, or to which race or sex they would belong — in this wholly fair, unbiased "original position," rational people would not risk wagering that they would end up at the very bottom of society, and so would tend to choose principles of justice that both guarantee basic liberty and take account of the interests of the least advantaged, rather than an arrangement that purely maximizes overall social utility.