But, in accepting this view, one must not be blinded to the fact that the changes wrought by environment in the character of a race, are of necessity extremely slow. The peculiar traits that give racial distinction to any company of people have not been attained except through many generations of slow alteration; and such is the conservative power of heredity that the characteristics thus slowly stamped upon a race are well-nigh indelible. How pertinacious is their hold is best illustrated in the case of the modern Jews, who retain their racial identity though scattered in all regions of the globe. With this illustration in mind, it cannot be matter for surprise that any race that remains in the same environment, and as a rule does not mingle with other races, shall have retained the same essential characteristics throughout the historic period. That such is really the historic fact regarding any particular race of antiquity, might not at first sight be obvious. It might seem, for example, that the modern Egyptian, who plays so insignificant a part in the world-history of the nineteenth century, must be a very different person indeed from his ancient progenitor, who maintained for many centuries the dominant civilisation of the world. But it must not be forgotten that national standards are relative; in other words, that the status of a people depends, not alone upon the plane of civilisation of that people itself, but quite as much upon the relative plane of civilisation of its neighbours. When the Egyptians sank from power, it was not so much that they lost their inherent capacity for progress, as that other nations outstripped them in the race, and came presently to dominate and subjugate them, and thus to stamp out their ambition. In support of this view, note the fact that the Egyptians again and again, at intervals of many centuries, were able to rouse themselves from a lethargy imposed by their conquerors, and to regain for a time their old position of supremacy. But the best tangible illustration of the fixity of the character of a race is furnished by the modern historians, who have at the same time most profoundly studied the ancient conditions as recorded on the monuments, and, while doing so, have been brought in contact with the present inhabitants of the Nile Valley. No other scholars of the present generation have made more profound investigations than Professor Petrie and Professor Erman, both of whom have been led to comment on the extraordinary similarity of manner and custom and inherent characteristics between the ancient and the modern Egyptians. Here is Professor Erman’s[g] verdict: