  Commerce, by contrast, has no such disadvantages. It does not require vast armies, or the continued subjugation of other peoples. It does not undermine itself, as the extraction of gold from colonial mines does, and it rewards domestic industry. It therefore sustains itself, and nations which engage in it, over time. While it does not produce all the virtues -- hospitality, Montesquieu thinks, is more often found among the poor than among commercial peoples -- it does produce some: "the spirit of commerce is naturally attended with that of frugality, economy, moderation, labor, prudence, tranquility, order, and rule" (SL 5.6). In addition, it "is a cure for the most destructive prejudices" (SL 20.1), improves manners, and leads to peace among nations.