The broad outline of the history of Egypt is simpler than the history of Mesopotamia. It has long been the custom to divide the rulers of Egypt into a succession of Dynasties, and in speaking of the periods of Egyptian history it is usual to speak of the first, fourth, fourteenth, and so on, Dynasty. The Egyptians were ultimately conquered by the Persians after their establishment in Babylon, and when finally Egypt fell to Alexander the Great in 332 B.C., it was Dynasty XXXI that came to an end. In that long history of over 4000 years, a much longer period than that between the career of Alexander the Great and the present day, certain broad phases of development may be noted here. There was a phase known as the “old kingdom,” which culminated in the IVth Dynasty; this Dynasty marks a period of wealth and splendour, and its monarchs were obsessed by such a passion for making monuments for themselves as no men have ever before or since had a chance to display and gratify. It was Cheops[114] and Chephren and Mycerinus of this IVth Dynasty who raised the vast piles of the great and the second and the third pyramids at Gizeh. These unmeaning[115] sepulchral piles, of an almost incredible vastness,[116] erected in an age when engineering science had scarcely begun, exhausted the resources of Egypt through three long reigns, and left her wasted as if by a war. The story of Egypt from the IVth to the XVth Dynasty is a story of conflicts between alternative capitals and competing religions, of separations into several kingdoms and reunions. It is, so to speak, an internal history. Here we can name only one of that long series of Pharaohs, Pepi II, who reigned ninety years, the longest reign in history, and left a great abundance of inscriptions and buildings. At last there happened to Egypt what happened so frequently to the civilizations of Mesopotamia. Egypt was conquered by nomadic Semites, who founded a “shepherd” dynasty, the Hyksos (XVIth), which was finally expelled by native Egyptians. This invasion probably happened while that first Babylonian Empire which Hammurabi founded was flourishing, but the exact correspondences of dates between early Egypt and Babylonia are still very doubtful. Only after a long period of servitude did a popular uprising expel these foreigners again. After the war of liberation (circa 1600 B.C.) there followed a period of great prosperity in Egypt, _the New Empire_. Egypt became a great and united military state, and pushed her expeditions at last as far as the Euphrates, and so the age-long struggle between the Egyptian and Babylonian-Assyrian power began.