For this reason, it is of the greatest importance to inquire whether any method of strengthening kindly impulses exists. I have no doubt that their strength or weakness depends upon discoverable physiological causes; let us assume that it depends upon the glands. If so, an international secret society of physiologists could bring about the millennium by kidnapping, on a given day, all the rulers of the world, and injecting into their blood some substance which would fill them with benevolence towards their fellow-creatures. Suddenly M. Poincare would wish well to Ruhr miners, Lord Curzon to Indian nationalists, Mr. Smuts to the natives of what was German South West Africa, the American Government to its political prisoners and its victims in Ellis Island. But alas, the physiologists would first have to administer the love-philtre to themselves before they would undertake such a task. Otherwise, they would prefer to win titles and fortunes by injecting military ferocity into recruits. And so we come back to the old dilemma: only kindliness can save the world, and even if we knew how to produce kindliness we should not do so unless we were already kindly. Failing that, it seems that the solution which the Houynhnms adopted towards the Yahoos, namely extermination, is the only one; apparently the Yahoos are bent on applying it to each other. We may sum up this discussion in a few words. Science has not given men more self-control, more kindliness, or more power of discounting their passions in deciding upon a course of action. It has given communities more power to indulge their collective passions, but, by making society more organic, it has diminished the part played by private passions. Men’s collective passions are mainly evil; far the strongest of them are hatred and rivalry directed towards other groups. Therefore at present all that gives men power to indulge their collective passions is bad. That is why science threatens to cause the destruction of our civilization. The only solid hope seems to lie in the possibility of world-wide domination by one group, say the United States, leading to the gradual formation of an orderly economic and political world-government. But perhaps, in view of the sterility of the Roman Empire, the collapse of our civilization would in the end be preferable to this alternative. Transcriber’s Notes Punctuation, hyphenation, and spelling were made consistent when a predominant preference was found in the original book; otherwise they were not changed. Simple typographical errors were corrected; unbalanced quotation marks were remedied when the change was obvious, and otherwise left unbalanced. Table of Contents added by Transcriber.