Besides prosecuting these splendid schemes for the aggrandizement of Egypt, King Ptolemy was engaged, during almost the whole period of his reign, in waging incessant wars with the surrounding nations. He engaged in these wars, in part, for the purpose of extending the boundaries of his empire, and in part for self-defense against the aggressions and encroachments of other powers. He finally succeeded in establishing his kingdom on the most stable and permanent basis, and then, when he was drawing toward the close of his life, being in fact over eighty years of age, he abdicated his throne in favor of his youngest son, whose name was also Ptolemy. Ptolemy the father, the founder of the dynasty, is known commonly in history by the name of Ptolemy Soter. His son is called Ptolemy Philadelphus. This son, though the youngest, was preferred to his brothers as heir to the throne on account of his being the son of the most favored and beloved of the monarch's wives. The determination of Soter to abdicate the throne himself arose from his wish to put this favorite son in secure possession of it before his death, in order to prevent the older brothers from disputing the succession. The coronation of Philadelphus was made one of the most magnificent and imposing ceremonies that royal pomp and parade ever arranged. Two years afterward Ptolemy the father died, and was buried by his son with a magnificence almost equal to that of his own coronation. His body was deposited in a splendid mausoleum, which had been built for the remains of Alexander; and so high was the veneration which was felt by mankind for the greatness of his exploits and the splendor of his reign, that divine honors were paid to his memory. Such was the origin of the great dynasty of the Ptolemies. Some of the early sovereigns of the line followed in some degree the honorable example set them by the distinguished founder of it; but this example was soon lost, and was succeeded by the most extreme degeneracy and debasement. The successive sovereigns began soon to live and to reign solely for the gratification of their own sensual propensities and passions. Sensuality begins sometimes with kindness, but it ends always in the most reckless and intolerable cruelty. The Ptolemies became, in the end, the most abominable and terrible tyrants that the principle of absolute and irresponsible power ever produced. There was one vice in particular, a vice which they seem to have adopted from the Asiatic nations of the Persian empire, that resulted in the most awful consequences. This vice was incest.