At any rate, it is one theme and one book, and the question of its form may be further pressed. The essential notion out of which this book sprang, I suggested, was that of the march of life, the shift of the generations in their order--a portentous subject to master, but Tolstoy's hand is broad and he is not afraid of great spaces. Such a subject could not be treated at all without a generous amount of room for its needs. It requires, to begin with, a big and various population; a few selected figures may hold the main thread of the story and represent its course, but it is necessary for their typical truth that their place in the world should be clearly seen. They are choice examples, standing away from the mass, but their meaning would be lost if they were taken to be utterly exceptional, if they appeared to be chosen _because_ they are exceptional. Their attachment to the general drama of life must accordingly be felt and understood; the effect of a wide world must be given, opening away to far distances round the action of the centre. The whole point of the action is in its representative character, its universality; this it must plainly wear. It begins to do so at once, from the very first. With less hesitation, apparently, than another man might feel in setting the scene of a street or parish, Tolstoy proceeds to make his world. Daylight seems to well out of his page and to surround his characters as fast as he sketches them; the darkness lifts from their lives, their conditions, their outlying affairs, and leaves them under an open sky. In the whole of fiction no scene is so continually washed by the common air, free to us all, as the scene of Tolstoy. His people move in an atmosphere that knows no limit; beyond the few that are to the fore there stretches a receding crowd, with many faces in full light, and many more that are scarcely discerned as faces, but that swell the impression of swarming life. There is no perceptible horizon, no hard line between the life in the book and the life beyond it. The communication between the men and women of the story and the rest of the world is unchecked. It is impossible to say of Peter and Andrew and Nicholas that they inhabit a "world of their own," as the people in a story-book so often appear to do; they inhabit _our_ world, like anybody else. I do not mean, of course, that a marked horizon, drawn round the action of a book and excluding everything that does not belong to it, is not perfectly appropriate, often enough; their own world may be all that the people need, may be the world that best reveals what they are to be and to do; it all depends on the nature of the fable. But to Tolstoy's fable space is essential, with the sense of the continuity of life, within and without the circle of the book. He never seems even to know that there can be any difficulty in providing it; while he writes, it is there.