This text is concerned with methods of curing three kinds of conflict which have afflicted mankind. They are the conflicts of man with nature, with other men, and with himself. Of these, the first is the concern of science, the second of politics, and the third of religion and psychology. Modern techniques have made poverty un-necessary, and have provided the possibility of a much higher level of general wellbeing than has ever existed at any former time. Failure to realize this possibility is due to the persistence of beliefs, principles, emotions, and habits of thought that were appropriate in earlier ages.