[Sidenote: Injury to Athens from the founding of Alexandria.] Not only was it thus by the drain of men that the Macedonian expedition was so dreadfully disastrous to Greece, the political consequences following those successful campaigns added to the baneful result. Alexander could not have more effectually ruined Athens had he treated her as he did Thebes, which he levelled with the ground, massacring six thousand of her citizens, and selling thirty thousand for slaves. The founding of Alexandria was the commercial end of Athens, the finishing stroke to her old colonial system. It might have been well for her had he stopped short in his projects with the downfall of Tyre, destroyed, not from any vindictive reasons, as is sometimes said, but because he discovered that that city was an essential part of the Persian system. It was never his intention that Athens should derive advantage from the annihilation of her Phoenician competitor; his object was effectually carried out by the building and prosperity of Alexandria. [Sidenote: Scientific tendency of the Macedonian campaigns.] [Sidenote: Origin of the influence of Aristotle through Alexander.] Though the military celebrity of this great soldier may be diminished by the history of the last hundred years, which shows a uniform result of victory when European armies are brought in contact with Asiatic, even under the most extraordinary disadvantages, there cannot be denied to him a profound sagacity and statesmanship excelled by no other conqueror. Before he became intoxicated with success, and, unfortunately, too frequently intoxicated with wine, there was much that was noble in his character. He had been under the instruction of Aristotle for several years, and, on setting out on his expedition, took with him so many learned men as almost to justify the remark applied to it, that it was as much a scientific as a military undertaking. Among those who thus accompanied him was Callisthenes, a relative and pupil of Aristotle, destined for an evil end. Perhaps the assertion that Alexander furnished to his master 250,000_l._ and the services of several thousand men, for the purpose of obtaining and examining the specimens required in the composition of his work on the "History of Animals" may be an exaggeration, but there can be no doubt that in these transactions was the real beginning of that policy which soon led to the institution of the Museum at Alexandria. The importance of this event, though hitherto little understood, admits of no exaggeration, so far as the intellectual progress of Europe is concerned. It gave to the works of Aristotle their wonderful duration; it imparted to them not only a Grecian celebrity, but led to their translation into Syriac by the Nestorians in the fifth century, and from Syriac by the Arabs into their tongue four hundred years later. They exercised a living influence over Christians and Mohammedans indifferently, from Spain to Mesopotamia.