The development of the ethical principle in mankind is largely due to the extension of the sentiment of social sympathy. For ages it was confined to the immediate group. Such was the case even in civilized Greece, intellectually one of the most advanced of peoples, but morally very contracted. The Greeks were long divided into minor groups, with the warmest sentiment of patriotism uniting the members of each community, while their common origin bound all the Hellenes together. But this feeling failed to cross the borders of the narrow peninsula of Greece, all peoples beyond these borders being viewed as barbarians, in whose pleasures and pains no interest was felt, and whose misfortunes produced no stir of sympathy in the Grecian heart. Even Aristotle taught that Greeks owed no more duties to barbarians than to wild beasts, and a philosopher who declared that his affection extended to the whole people of Greece was thought to be remarkably sympathetic. The Romans were equally narrow in their early days, and not until the empire extended to the outer borders of the civilized world did this narrowness give way to a more expanded sympathy. The brotherhood of mankind, indeed, was taught by Socrates, Cicero, and others of the ancient moral philosophers, yet these seeds of philosophy fell in very sterile soil and took root with discouraging slowness. Philosophers elsewhere taught the dogma of universal love,--Confucius among the Chinese, Gautama among the Hindoos,--but their teachings have borne little fruit in the great, stagnant peoples of Asia, in whom the narrowness of semicivilization prevails. The teachings of Christ, whose code of morality was the intuitive one, "Love one another," have been far more effective. Christianity became the religion of Europe, since then the most progressive part of the world, and with every step of progress in civilization the Christ doctrine of charity and sympathy reached a higher and broader stage. To-day it has attained, in Europe and America, a wide degree of development, and the vast extension of human intercourse through the mediums of travel, commerce, and telegraphic communication is, for the first time in human history, beginning to lift the doctrine of the universal brotherhood of man from the plane of a philosophic dogma toward that of an established fact. The range of sympathy is narrow yet, selfishness predominates, the truly altruistic are the few, the feebly sympathetic and coldly selfish are the many; yet it must be admitted that there has been a great development of altruism during the nineteenth century, and the promise of the coming of Christ's kingdom on the earth is greater to-day than at any former period in the history of mankind.