This is the story of the earth from the first thing we know of it to the time in which we live. It is the story of man from the first thing we know of him to the last thought that the vision of modern science can suggest. There is no need here to discuss the question how far it is possible to write a universal history, or on what lines such a history should proceed. These points may well be left where Lord Bryce leaves them in his introduction to this book. Nor need we consider what history is; the plain man may be left to make up his own mind as to that while the philosophers are making up theirs. A word may be said, however, of the plan and purpose of this work, especially of that distinction of it which is at once the ground of its appeal and its justification. A UNIVERSAL HISTORY OF THE UNIVERSE It is a commonplace to say of a great work that it is unique, and there would at first sight seem to be peculiar presumption in making such a claim for a History of the World. It may be claimed, however, without any fear of contradiction, that this work has no rival in the English language. There have been histories of the world before; there are available in large numbers histories of all countries well worthy of attention; but there is not, and it may be doubted if there has ever been attempted before, a scientific World-History. This work is, as far as it can possibly be in the present state of knowledge, a universal history of the universe. SCIENCE AND HISTORY That is a far reaching claim to make, but a mere glance through the names of those whose services have been enlisted for the work will make its basis clear. The contributors include some of the foremost students of science. Many men of eminence whose names do not usually come into historical works will be found here. Their function may be described as holding the Lamp of Science up to History. It is for these authorities to read the story of the earth and to tell the plain man what they read there, as Turner read the sunset and painted what he saw. The simile is not so unfortunate as it may appear, because, although our canvas has not the same room for the artist’s imagination as Turner’s had, it will probably be admitted that the imagination of the scientist is often nearer to the truth of things than the conventional belief. THE LIFE-STORY OF ALL NATIONS