In his Introduction John Gray describes these essays as applications of Mill's doctrine of the Art of Life, as set out in A System of Logic. Using the resources of recent scholarship, he shows Mill's work to be far richer and subtler than traditional interpretations allow.

    Self-serving monarchic social systems, which collectively reduced common people to servitude, were now attacked by Enlightenment philosophers, of whom Rouseau was a leading light.His masterpiece, The Social Contract, profoundly influenced the subsequent development of society and remains provocative in a modern age of continuing widespread vested interest. This is the most comprehensive paperback edition available, with introduction, notes, index and chronology of Rousseau's life and times.