The greater number of people and their greater industry are serviceable in all cases—at home and abroad, in private and in public. But the greater plenty of money is very limited in its use, and may even sometimes be a loss to a nation in its commerce with foreigners. There seems to be a happy concurrence of causes in human affairs which checks the growth of trade and riches, and hinders them from being confined entirely to one people, as might naturally at first be dreaded from the advantages of an established commerce. Where one nation has got the start of another in trade it is very difficult for the latter to regain the ground it has lost, because of the superior industry and skill of the former, and the greater stocks of which its merchants are possessed, and which enable them to trade for so much smaller profits. But these advantages are compensated, in some measure, by the low price of labour in every nation which has not an extensive commerce, and does not very much abound in gold and silver. Manufactures, therefore, gradually shift their places, leaving those countries and provinces which they have already enriched, and flying to others, whither they are allured by the cheapness of provisions and labour, till they have enriched these also and are again banished by the same causes. And, in general, we may observe that the dearness of everything, from plenty of money, is a disadvantage which attends an established commerce, and sets bounds to it in every country by enabling the poorer states to under-sell the richer in all foreign markets.