Plato wrote a book on the One Ideal Constitution, but because of its forbidding character he could not persuade anyone to adopt it; but Alexander established more than seventy cities among savage tribes, and sowed all Asia with Grecian magistracies, and thus overcame its uncivilized and brutish manner of living. Although few of us read Plato’s Laws, yet hundreds of thousands have made use of Alexander’s laws, and continue to use them. Those who were vanquished by Alexander are happier than those who escaped his hand; for these had no one to put an end to the wretchedness of their existence, while the victor compelled those others to lead a happy life. If, then, philosophers take the greatest pride in civilizing and rendering adaptable the intractable and untutored elements in human character, and if Alexander has been shown to have changed the savage natures of countless tribes, it is with good reason that he should be regarded as a very great philosopher.
The much-admired Republic of Zeno, the founder of the Stoic sect, may be summed up in this one main principle: that all the inhabitants of this world of ours should not live differentiated by their respective rules of justice into separate cities and communities, but that we should consider all men to be of one community and one polity, one law should govern all mankind, one rule of justice as a common source of light. We should have a common life and an order common to us all, even as a herd that feeds together and shares the pasturage of a common field. This Zeno wrote, giving shape to a dream or, as it were, shadowy picture of a well-ordered and philosophic commonwealth
It was Alexander who gave effect to the idea. For Alexander did not follow Aristotle’s advice to treat the Greeks as if he were their leader, and other peoples as if he were their master; to have regard for the Greeks as for friends and kindred, but to conduct himself toward other peoples as though they were plants or animals; for to do so would have been to cumber his leadership with numerous battles and banishments and festering seditions. But, as he believed that he came as a heaven-sent governor to all, and as a mediator for the whole world, those whom he could not persuade to unite with him, he conquered by force of arms, and he brought together into one body all men everywhere, uniting and mixing in one great loving-cup, as it were, men’s lives, their characters, their marriages, their very habits of life. He bade them all consider as their fatherland the whole inhabited earth, as their stronghold and protection his camp, as akin to them all good men, and as foreigners only the wicked ; they should not distinguish between Grecian and foreigner by Grecian cloak and targe, or scimitar and jacket; but the distinguishing mark of the Grecian should be seen in virtue, and that of the foreigner in iniquity.