The annual labour of every nation is the fund which originally supplies it with all the necessaries and conveniencies of life. The first, most basic insight of The Wealth of Nations is that it is not gold, or money, that makes nations rich, but the productivity of their workers. According therefore, as this produce, or what is purchased with it, bears a greater or smaller proportion to the number of those who are to consume it, the nation will be better or worse supplied with all the necessaries and conveniencies for which it has occasion. But this proportion must in every nation be regulated by two different circumstances; first by the skill, dexterity, and judgment with which its labour is generally applied; and, secondly, by the proportion between the number of those who are employed in useful labour, and that of those who are not so employed. A nation may divided into two classes: the class of those who work, and the class of those who consume without working. The total produce of a nation is divided between those two classes. Observe the accommodation of the most common artificer or day-labourer in a civilized and thriving country, and you will perceive that the number of people of whose industry a part, though but a small part, has been employed in procuring him this accommodation, exceeds all computation. The woollen coat, for example, which covers the day-labourer, as coarse and rough as it may appear, is the produce of the joint labour of a great multitude of workmen. The shepherd, the sorter of the wool, the wool-comber or carder, the dyer, the scribbler, the spinner, the weaver, the fuller, the dresser, with many others, must all join their different arts in order to complete even this homely production... without the assistance and co-operation of many thousands, the very meanest person in a civilized country could not be provided, even according to what we very falsely imagine, the easy and simple manner in which he is commonly accommodated. No one exists by his own labor alone. Everyone, in a civilized society, owes his possessions not to his his own efforts, but to the efforts of thousands of others. Moreover, those possessions are the product of civilization itself.