In seeking a political theory which is to be useful at any given moment, what is wanted is not the invention of a Utopia, but the discovery of the best direction of movement. The direction which is good at one time may be superficially very different from that which is good at another time. Useful thought is that which indicates the right direction for the present time. But in judging what is the right direction there are two general principles which are always applicable. 1. The growth and vitality of individuals and communities is to be promoted as far as possible. 2. The growth of one individual or one community is to be as little as possible at the expense of another. The second of these principles, as applied by an individual in his dealings with others, is the principle of _reverence_, that the life of another has the same importance which we feel in our own life. As applied impersonally in politics, it is the principle of _liberty_, or rather it includes the principle of liberty as a part. Liberty in itself is a negative principle; it tells us not to interfere, but does not give any basis for construction. It shows that many political and social institutions are bad and ought to be swept away, but it does not show what ought to be put in their place. For this reason a further principle is required, if our political theory is not to be purely destructive. The combination of our two principles is not in practice an easy matter. Much of the vital energy of the world runs into channels which are oppressive. The Germans have shown themselves extraordinarily full of vital energy, but unfortunately in a form which seems incompatible with the vitality of their neighbors. Europe in general has more vital energy than Africa, but it has used its energy to drain Africa, through industrialism, of even such life as the negroes possessed. The vitality of southeastern Europe is being drained to supply cheap labor for the enterprise of American millionaires. The vitality of men has been in the past a hindrance to the development of women, and it is possible that in the near future women may become a similar hindrance to men. For such reasons the principle of reverence, though not in itself sufficient, is of very great importance, and is able to indicate many of the political changes that the world requires. In order that both principles may be capable of being satisfied, what is needed is a unifying or integration, first of our individual lives, then of the life of the community and of the world, without sacrifice of individuality. The life of an individual, the life of a community, and even the life of mankind, ought to be, not a number of separate fragments but in some sense a whole. When this is the case, the growth of the individual is fostered, and is not incompatible with the growth of other individuals. In this way the two principles are brought into harmony.