There lived in Alexandria, in Diodorus Siculus’s time, 300,000 free people, comprehending, I suppose, women and children.[88] But what number of slaves? Had we any just ground to fix these at an equal number with the free inhabitants, it would favour the foregoing calculation.
There is a passage in Herodian which is a little surprising. He says positively that the palace of the emperor was as large as all the rest of the city. This was Nero’s golden house, which is indeed represented by Suetonius and Pliny[89] as of an enormous extent, but no power of imagination can make us conceive it to bear any proportion to such a city as London.
We may observe that, had the historian been relating Nero’s extravagance, and had he made use of such an expression, it would have had much less weight, these rhetorical exaggerations being so apt to creep into an author’s style even when the most chaste and correct; but it is mentioned by Herodian only by the by, in relating the quarrels between Geta and Caracalla. {p160}
It appears from the same historian that there was then much land uncultivated and put to no manner of use, and he ascribes it as a great praise to Pertinax that he allowed every one to take such land either in Italy or elsewhere and cultivate it as he pleased, without paying any taxes. Lands uncultivated and put to no manner of use! This is not heard of in any part of Christendom, except perhaps in some remote parts of Hungary, as I have been informed. And it surely corresponds very ill with that idea of the extreme populousness of antiquity so much insisted on.
We learn from Vopiscus that there was in Etruria much fertile land uncultivated, which the Emperor Aurelian intended to convert into vineyards, in order to furnish the Roman people with a gratuitous distribution of wine: a very proper expedient to dispeople still further that capital and all the neighbouring territories.
It may not be amiss to take notice of the account which Polybius gives of the great herds of swine to be met with in Tuscany and Lombardy, as well as in Greece, and of the method of feeding them which was then practised. “There are great herds of swine,” says he, “throughout all Italy, particularly in former times, through Etruria and Cisalpine Gaul. And a herd frequently contains a thousand or more swine. When one of these herds in feeding meets with another they mix together, and the swineherds have no other expedient to separate them than to go to different quarters, where they sound their horn, and these animals, being accustomed to that signal, run immediately each to the horn of his own keeper. Whereas in Greece, if the herds of swine happen to mix in the forests, he who has the greatest flock takes cunningly the opportunity of driving all away. And thieves are very apt to purloin the straggling hogs which have wandered to a great distance from their keeper in search of food.”
May we not infer from this account that the North of Italy was then much less peopled and worse cultivated than at present? How could these vast herds be fed in a country so thick of enclosures, so improved by agriculture, so divided {p161} by farms, so planted with vines and corn intermingled together? I must confess that Polybius’s relation has more the air of that economy which is to be met with in our American colonies than the management of a European country.
We meet with a reflection in Aristotle’s[90] Ethics which seems to me unaccountable on any supposition, and by proving too much in favour of our present reasoning, may be thought really to prove nothing. That philosopher, treating of friendship, and observing that that relation ought neither to be contracted to the very few nor extended over a great multitude, illustrates his opinion by the following argument. “In like manner,” says he, “as a city cannot subsist if it either have so few inhabitants as ten, or so many as a hundred thousand, so is there a mediocrity required in the number of friends, and you destroy the essence of friendship by running into either extreme.” What! impossible that a city can contain a hundred thousand inhabitants! Had Aristotle never seen nor heard of a city which was near so populous? This, I must own, passes my comprehension.
Pliny tells us that Seleucia, the seat of the Greek empire in the East, was reported to contain 600,000 people. Carthage is said by Strabo to have contained 700,000. The inhabitants of Pekin are not much more numerous. London, Paris, and Constantinople may admit of nearly the same computation; at least, the two latter cities do not exceed it. Rome, Alexandria, Antioch we have already spoke of. From the experience of past and present ages one might conjecture that there is a kind of impossibility that any city could ever rise much beyond this proportion. Whether the grandeur of a city be founded on commerce or on empire, there seems to be invincible obstacles which prevent its further progress. The seats of vast monarchies, by introducing extravagant luxury, irregular expense, idleness, dependence, and false ideas of rank and superiority, are {p162} improper for commerce. Extensive commerce checks itself by raising the price of all labour and commodities. When a great court engages the attendance of a numerous nobility possessed of overgrown fortunes, the middling gentry remain in their provincial towns, where they can make a figure on a moderate income. And if the dominions of a state arrive at an enormous size, there necessarily arise many capitals in the remoter provinces, whither all the inhabitants except a few courtiers repair for education, fortune, and amusement.[91] London, by uniting extensive commerce and middling empire, has perhaps arrived at a greatness which no city will ever be able to exceed.
Choose Dover or Calais for a centre: draw a circle of two hundred miles radius; you comprehend London, Paris, the Netherlands, the United Provinces, and some of the best cultivated counties of France and England. It may safely, I think, be affirmed that no spot of ground can be found in antiquity, of equal extent, which contained near so many great and populous cities, and was so stocked with riches and inhabitants. To balance, in both periods, the states which possessed most art, knowledge, civility, and the best police seems the truest method of comparison.