'This brilliant counterrevolutionary book makes a frontal attack on the widely accepted claim that Kenneth Arrow's impossibility theorem for social choice shows democracy to be impossible, arbitrary, and meaningless. In delightfully direct and jargon-free language, Mackie demolishes the theoretical and empirical bases for this claim, notably in the strong version defended by William Riker and his students. His careful and exhaustive re-examination of all the instances on which Riker based his arguments is particularly valuable. At the same time, he puts up a strong defence - two cheers at least - for the institutions of representative democracy. After this vigorous and rigorous attack, social choice theory will never be the same again.' Jon Elster, Columbia University