Whensoever he gives us the account of any considerable action, he never fails to tell us why it succeeded, or for what reason it miscarried; together with all the antecedent causes of its undertaking, and the manner of its performance; all which he accurately explains: of which I will select but some few instances, because I want leisure to expatiate on many. In the fragments of the seventeenth book he makes a learned dissertation concerning the Macedonian phalanx, or gross body of foot, which was formerly believed to be invincible, till experience taught the contrary by the success of the battle which Philip lost to the commonwealth of Rome; and the manifest and most certain causes are therein related, which prove it to be inferior to the Roman legions. When also he had told us in his former books, of the three great battles wherein Hannibal had overthrown the Romans, and the last at Cannæ, wherein he had in a manner conquered that republic, he gives the reasons of every defeat, either from the choice of ground, or the strength of the foreign horse in Hannibal’s army, or the ill-timing of the fight on the vanquished side. After this, when he describes the turn of fortune on the part of the Romans, you are visibly conducted upwards to the causes of that change, and the reasonableness of the method which was afterwards pursued by that commonwealth, which raised it to the empire of the world. In these and many other examples, which for brevity are omitted, there is nothing more plain than that Polybius denies all power to fortune, and places the sum of success in Providence; συμβαινογγων τὑχην ἁιτιασθι φαυλον, indeed, are his words, It is a madness to make fortune the mistress of events, because in herself she is nothing, can rule nothing, but is ruled by prudence. So that whenever our author seems to attribute any thing to chance, he speaks only with the vulgar, and desires so to be understood.