The greatest empires have in the past allowed great diversity between states. Persia left each land to its own laws, and only required the control of a satrap, a small tribute, and unification of army and navy. Rome interfered very little with local law, and left the principal cities autonomous throughout the empire. Britain has carefully preserved local law where a system existed, as in India, the Cape, and many varieties nearer home, even in England itself. The United States have kept local laws of states and local legislatures. Hence it is likely that groups of states with great variety of type will prevail, only unified by a common system of defence and compulsory taxation for that purpose. It is even conceivable that such a system might be established in England, if the Privy Council was supplemented by Colonial ex-ministers of long standing, and was granted powers of assessment over all parliaments for the common defence. The type of man which must prevail is that of the greatest industry and greatest individuality; each man belonging to many voluntary societies for various united benefits. Agriculture, the main industry of man, will be far more elaborate and economical; as much so as the present Chinese system, or even carried to further detail with machinery. And the unlimited supply of atmospheric nitrates, now in sight, will also greatly increase production. Profit-sharing or the shareholding of all workers must gradually prevail in all industries. The growth of rapidity of thought and action, and the economy of organisation, will enable a living to be earned with perhaps half a day's labour, or less. The large balance of time, beyond that which will be needed for bare necessities, will be spent on a much greater development of natural resources and conveniences of life; each man will thus enjoy the result of an immense accumulated capital of improvements and benefits. In short, each one will be rich, either by the cheapness of articles or abundance of money, a merely relative question. The accumulated wealth of improvement will leave a smaller profit on labour, or in other words capital will command a very low interest. Therefore there will be less inducement to work for saving; and hence spare time will be more readily employed in the personal quest of knowledge, and enlargement of mental interests, in literature, in science, in history, and in the arts, or among the less capable in mere amusements. But the higher the social organisation and reward of ability, the more intense will be the weeding of the less capable, and the more highly sustained will be the general level of ability.