by which man has moved up and on to his present grade, and may move farther. Among those processes none is clearer, simpler, easier to understand, than industrial evolution. Its laws are identical with those of physical evolution, a progression from the less to the greater, from the simple to the complex, a constant adaptation of means to ends, a tendency to minimise effort and maximise efficiency. The solitary savage applies his personal energy to his personal needs. The social group applies its collective energy to its collective needs. The savage works by himself, for himself; the civilised man works in elaborate inter-dependence with many, for many. By the division of labour and its increasing specialisation we vastly multiply skill and power; by the application of machinery we multiply the output; by the development of business methods we reduce expense and increase results; the whole line of growth is the same as that which makes a man more efficient in action than his weight in shell-fish. He is more highly organised and specialised. So is modern industry.
