The progress made by the natural sciences in the nineteenth century awakened in modern thinkers the desire to work out a new system of ethics on positive bases. After having established the fundamental principles of a universal philosophy free from postulates of supernatural forces, and at the same time, majestic, poetical, and capable of stimulating in men the highest motives,-modern science no longer needs to resort to supernatural inspiration to justify its ideals of moral beauty. Besides, science foresees that in the not-distant future, human society, liberated, through the progress of science, from the poverty of former ages, and organized on the principles of justice and mutual aid, will be able to secure for man free expression of his intellectual, technical, and artistic creative impulses. And this prevision opens up such broad moral possibilities for the future, that for their realization there is no longer any need either of the influence of the supernatural wor...