As I have already indicated, there may be more than one dominant element; for instance, two or more principal characters in a novel or play--Lord and Lady Macbeth, Sancho and Don Quixote, Othello and Desdemona, Brand and his wife. In this case, there must be either subordination among them, a hierarchical arrangement; or else reciprocity or balance, as in the illustrations cited, where it is difficult to tell which is the more important of the two; otherwise they would pull the whole apart. The advantage of several dominant elements lies in the greater animation, and when the work is large, in the superior organization, which they confer. In order that there may be perspicuity, it is necessary, when there are many elements, that they be separated into minor groups around high points which individualize and represent them, and so take their place in the mind, mediating between them and unity when a final synthesis of the whole is to be made. The third great principle of aesthetic structure is equilibrium or impartiality. This is a principle counteracting dominance. It demands, despite the subordination among the elements, that none be neglected. Each, no matter how minor its part in the whole, must have some unique value of its own, must be an end as well as a means. Dominance is the aristocratic principle in art, the rule of the best; this is the democratic principle, the demand for freedom and significance for all. Just as, in a well-ordered state, the happiness of no individual or class of individuals is sacrificed to that of other individuals or classes; so in art, each part must be elaborated and perfected, not merely for the sake of its contribution to the whole, but for its own sake. There should be no mere figure-heads or machinery. Loving care of detail, of the incidental, characterizes the best art. Of course this principle, like the others, is an ideal or norm, which is only imperfectly realized in many works of art. Many a poet finds it necessary to fill in his lines and many a painter and musician does the like with his pictures or compositions. There is much mere scaffolding and many lay-figures in drama and novel. But the work of the masters is different. There each line or stroke or musical phrase, each character or incident, is unique or meaningful. The greatest example of this is perhaps the _Divine Comedy_, where each of the hundred cantos and each line of each canto is perfect in workmanship and packed with significance. There is, of course, a limit to this elaboration of the parts, set by the demands for unity and wholeness. The individuality of the elements must not be so great that we rest in them severally, caring little or nothing for their relations to one another and to the whole. The contribution of this principle is richness. Unity in variety gives wholeness; dominance, order; equilibrium, wealth, interest, vitality.