"Altruism itself was so insisted upon in the latter half of the nineteenth century that … theory and practice, words and deeds, stood in liveliest contradiction. … Everywhere a conflict rent the world in twain: it created abysses in every thinker’s scheme of things: it made its presence so unpleasantly real that the best brains gave up research and thinking, and crept for refuge into a profession, a craft, into libraries, or hid themselves in the mine-shafts of specialism."