It is this conception of the unity of the human career which is perhaps the greatest achievement of historical study, since it gained a place analogous to that of natural science.
There was an age, however, when the transition from savagery to civilization, with all its impressive outward manifestations in art and architecture, took place for the first time.
Today the traveller on the Nile enters a wonderland at whose gates rise the colossal pyramids of which he has had visions perhaps from earliest childhood.
