Cæsar enumerates very particularly the great forces which were levied at Belgium to oppose his conquests, and makes them amount to 208,000. These were not the whole people able to bear arms in Belgium; for the same historian tells us that the Bellovaci could have brought a hundred thousand men into the field, though they engaged only for sixty. Taking the whole, therefore, in this proportion of ten to six, the sum of fighting men in all the states of Belgium was about 350,000; all the inhabitants a million and a half. And Belgium being about the fourth of Gaul, that country might contain six millions, which is not the third of its present inhabitants.[96] We are informed by Cæsar that the Gauls had no fixed property in land; but that the chieftains, when any death happened in a family, made a new division of all the lands among the several members of the family. This is the custom of Tanistry, which so long prevailed in {p168} Ireland, and which retained that country in a state of misery, barbarism, and desolation.
The ancient Helvetia was 250 miles in length and 180 in breadth, according to the same author, yet contained only 360,000 inhabitants. The Canton of Berne alone has at present as many people.
After this computation of Appian and Diodorus Siculus, I know not whether I dare affirm that the modern Dutch are more numerous than the ancient Batavi.
Spain is decayed from what it was three centuries ago; but if we step backward two thousand years and consider the restless, turbulent, unsettled condition of its inhabitants, we may probably be inclined to think that it is now much more populous. Many Spaniards killed themselves when deprived of their arms by the Romans. It appears from Plutarch that robbery and plunder were esteemed honourable among the Spaniards. Hirtius represents in the same light the situation of that country in Cæsar’s time, and he says that every man was obliged to live in castles and walled towns for his security. It was not till its final conquest under Augustus that these disorders were repressed. The account which Strabo and Justin give of Spain corresponds exactly with those above mentioned. How much therefore must it diminish from our idea of the populousness of antiquity when we find that Cicero, comparing Italy, Africa, Gaul, Greece, and Spain, mentions the great number of inhabitants as the peculiar circumstance which rendered this latter country formidable.[97]
Italy, it is probable however, has decayed; but how many great cities does it still contain? Venice, Genoa, Pavia, Turin, Milan, Naples, Florence, Leghorn, which either {p169} subsisted not in ancient times, or were then very inconsiderable. If we reflect on this, we shall not be apt to carry matters to so great an extreme as is usual with regard to this subject.
When the Roman authors complain that Italy, which formerly exported corn, became dependent on all the provinces for its daily bread, they never ascribe this alteration to the increase of its inhabitants, but to the neglect of tillage and agriculture. A natural effect of that pernicious practice of importing corn in order to distribute it gratis among the Roman citizens, and a very bad means of multiplying the inhabitants of any country.[98] The sportula, so much talked of by Martial and Juvenal, being presents regularly made by the great lords to their smaller clients, must have had a like tendency to produce idleness, debauchery, and a continual decay among the people. The parish-rates have at present the same bad consequences in England.
Were I to assign a period when I imagine this part of the world might possibly contain more inhabitants than at present, I should pitch upon the age of Trajan and the Antonines, the great extent of the Roman Empire being then civilized and cultivated, settled almost in a profound peace both foreign and domestic, and living under the same regular police and government.[99] But we are told that all {p170} extensive governments, especially absolute monarchies, are destructive to population, and contain a secret vice and poison, which destroy the effect of all these promising appearances. To confirm this, there is a passage cited from Plutarch, which being somewhat singular, we shall here examine it.
That author, endeavouring to account for the silence of many of the oracles, says that it may be ascribed to the present desolation of the world, proceeding from former wars and factions, which common calamity, he adds, has fallen heavier upon Greece than on any other country; insomuch that the whole could scarce at present furnish three thousand warriors, a number which, in the time of the Median War, were supplied by the single city of Megara. The gods, therefore, who affect works of dignity and importance, have suppressed many of their oracles, and deign not to use so many interpreters of their will to so diminutive a people. {p171}
I must confess that this passage contains so many difficulties that I know not what to make of it. You may observe that Plutarch assigns for a cause of the decay of mankind not the extensive dominion of the Romans, but the former wars and factions of the several nations, all which were quieted by the Roman arms. Plutarch’s reasoning, therefore, is directly contrary to the inference which is drawn from the fact he advances.
Polybius supposes that Greece had become more prosperous and flourishing after the establishment of the Roman yoke;[100] and though that historian wrote before these {p172} conquerors had degenerated from being the patrons to be the plunderers of mankind, yet as we find from Tacitus that the severity of the emperors afterwards checked the licence of the governors, we have no reason to think that extensive monarchy so destructive as it is so often represented.