Envy, the third of the psychological causes to which we attributed what is bad in the actual world, depends in most natures upon that kind of fundamental discontent which springs from a lack of free development, from thwarted instinct, and from the impossibility of realizing an imagined happiness. Envy cannot be cured by preaching; preaching, at the best, will only alter its manifestations and lead it to adopt more subtle forms of concealment. Except in those rare natures in which generosity dominates in spite of circumstances, the only cure for envy is freedom and the joy of life. From populations largely deprived of the simple instinctive pleasures of leisure and love, sunshine and green fields, generosity of outlook and kindliness of dispositions are hardly to be expected. In such populations these qualities are not likely to be found, even among the fortunate few, for these few are aware, however dimly, that they are profiting by an injustice, and that they can only continue to enjoy their good fortune by deliberately ignoring those with whom it is not shared. If generosity and kindliness are to be common, there must be more care than there is at present for the elementary wants of human nature, and more realization that the diffusion of happiness among all who are not the victims of some peculiar misfortune is both possible and imperative. A world full of happiness would not wish to plunge into war, and would not be filled with that grudging hostility which our cramped and narrow existence forces upon average human nature. A world full of happiness is not beyond human power to create; the obstacles imposed by inanimate nature are not insuperable. The real obstacles lie in the heart of man, and the cure for these is a firm hope, informed and fortified by thought. CHAPTER VII SCIENCE AND ART UNDER SOCIALISM