Thus Egypt gradually fell into the hands of strangers after the commencement of the fourth century before Christ. Ethiopians, Assyrians and Persians had by turns overrun the country. Great numbers of the Phœnicians had established themselves in it, and, after the fall of Jerusalem and Samaria, many Jews followed their example. Finally, the Greeks came in by thousands through the breaches which their predecessors had made, penetrating into all parts, and making everywhere felt the superiority of a people who had, by appropriating the useful results obtained in a long succession of centuries by more ancient races, become wealthier, stronger, and better instructed than any of their forerunners. Thus Egypt lost her power of national rejuvenation, her power of rising again after calamity. She existed on through the centuries by mere force of habit, but she lived no more. Her population was so homogeneous, and her institutions were so solid, that the social conditions of the country could not be changed in a day or even in a century. The teachings of her religion had been established by so long a course of development, and the hands of her artists were so well practised, that the monumental types which had been created in more fertile periods of her history were reproduced until a late date, in a machine-like and instinctive fashion. Imagination was dead, and the best that could be hoped for was the faithful repetition of those forms which the genius of the race had conceived in its last moments of original thought.