This book, which is based upon the broadcast lectures, "Living in an Atomic Age," 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 well-being than has ever existed at any former time. Failure to realized this possibility is due to the persistence of beliefs, principles, emotions, and habits of thought that were appropriate in earlier ages, but which should now be obsolete. The new techniques have made co-operation more important and competition less desirable than at any earlier time. The gloomy fears by which our time is opressed are un-necessary, and if men in general would realize the happiness that modern knowledge and skill render possible, they could within a very short time remove the main causes of fear and hopelessness.