I thought this was the best point; first, because it is there that Aratus leaves off, and I meant my work, as far as it was Greek history, to be a continuation of his; and, secondly, because the period thus embraced in my history would fall partly in the life of my father, and partly in my own; and thus I should be able to speak as eye-witness of some of the events, and from the information of eye-witnesses of others. To go further back and write the report of a report, traditions at second or third hand, seemed to me unsatisfactory either with a view to giving clear impressions or making sound statements. But, above all, I began at this period because it was then that the history of the whole world entered on a new phase. Philip, son of Demetrius, had just become the boy king of Macedonia; Achaeus, prince of Asia on this side of Taurus, had converted his show of power into a reality; Antiochus the Great had, a short time before, by the death of his brother Seleucus, succeeded while quite a young man to the throne of Syria; Ariarathes to that of Cappadocia; and Ptolemy Philopator to that of Egypt. Not long afterwards Lycurgus became King of Sparta, and the Carthaginians had recently elected Hannibal general to carry on the war lately described. Every government therefore being changed about this time, there seemed every likelihood of a new departure in policy: which is but natural and usual, and in fact did at this time occur. For the Romans and Carthaginians entered upon the war I have described; Antiochus and Ptolemy on one for the possession of Coele-Syria; and the Achaeans and Philip one against the Aetolians and Lacedaemonians. The causes of this last war must now be stated.