Mr. Herbert Spencer has familiarised us with the lesson that in politics and social experiments it is the unforeseen and unintended results of legislation which are far the most important, and that the industrial organisation of the country, or we may now say of the world, is not the fulfilment of any design preconceived by any governmental agency, but the unintended result of innumerable actions on the part of men who never dreamed that their action would have any such outcome. The reason of this is to be sought in the fact that society is an organism and that its growth follows the same laws as those which regulate the structural development of an amœba or a rhizopod. Thus, both society and the animal organism must be fed. To be fed, both must appropriate nutriment from the environment. That nutriment must be taken up and must be distributed to all parts of the organism, social or animal, if all parts are to be fed--and all must be fed, because all are mutually dependent, and to neglect one would disorganise the whole. Channels of communication must be established between all parts, in order that food may be conveyed from the organ which took it from the environment to the organs which require it for support. What marks the process of evolution in both cases is the increasing division of labour and the increasing interdependence of the parts on one another. The animal organism, like the social organism, is made up of a multitude of living units, each one of which is continually adjusting itself to the requirements of all the rest. The increasing complexity in the structure of an animal organism is possible only because the living units of one part take upon themselves new functions, or devote themselves exclusively to one function, in order to benefit the units of a distant part. If they purposed or were purposed to produce that result, they could not behave differently or better. But this appearance of purpose is mere semblance: the minute cells of an animal organism have no intention of producing even a rhizopod or an amœba. The explanation of this mimicry of purpose lies in the fact of the mutual interdependence of the parts: no change can take place in one organ of society or of the animal without being transmitted through the whole, just as you cannot remove one of the undermost of a cartload of bricks without more or less disturbing all the rest. But what is true of the bricks or of the units of the animal organism is true of the units of the social organism: what we discover in their action and reaction on one another is the operation, not of voluntary purpose, but of invariable laws of cause and effect.