We may form a similar remark with regard to the general history of mankind. What is the reason why no people living between the tropics could ever yet attain to any art or civility, or reach even any police in their government, and any military discipline; while few nations in the temperate climates have been altogether deprived of these advantages? It is probable that one cause of this phenomenon is the warmth and equality of weather in the torrid zone, which render clothes and houses less requisite for the inhabitants, and thereby remove, in part, that necessity which is the great spur to industry and invention. _Curis acuens mortalia corda._ Not to mention that the fewer goods or possessions of this kind any people enjoy, the fewer quarrels are likely to arise amongst them, and the less necessity will there be for a settled police or regular authority to protect and defend them from foreign enemies, or from each other. NOTES, OF COMMERCE. [7] Monsieur Melon, in his political essay on commerce, asserts that even at present, if you divide France into twenty parts, sixteen are labourers or peasants, two only artisans, one belonging to the law, church, and military, and one merchants, financiers, and bourgeois. This calculation is certainly very erroneous. In France, England, and indeed most parts of Europe, half of the inhabitants live in cities; and even of those who live in the country, a very great number are artisans, perhaps above a third. [8] _Diod. Sic._, lib. 2. This account, I own, is somewhat suspicious, not to say worse, chiefly because this army was not composed of citizens, but of mercenary forces. [9] The more ancient Romans lived in perpetual war with all their neighbours; and in old Latin the term “hostis” expressed both a stranger and an enemy. This is remarked by Cicero; but by him is ascribed to the humanity of his ancestors, who softened, as much as possible, the denomination of an enemy by calling him by the same appellation which signified a stranger. (_De Off._, lib. 2.) It is, however, much more probable, from the manners of the times, that the ferocity of those people was so great as to make them regard all strangers as enemies, and call them by the same name. It is not, besides, consistent with the most common maxims of policy or of nature that any state should regard its public enemies with a friendly eye, or preserve any such sentiments for them as the Roman orator would ascribe to his ancestors. Not to mention that the early Romans really exercised piracy, as we learn from their first treaties with Carthage, preserved by Polybius, lib. 3, and consequently, like the Sallee and Algerine rovers, were actually at war with most nations, and a stranger and an enemy were with them almost synonymous. OF REFINEMENT IN THE ARTS.