According to the _Chrematists_, the wealth of a nation, as of an individual producer, is to be measured by the excess of the value of production over its cost. This, says Sismondi, is the most fatal of all errors, and the grand source of the misery of the working classes, and instability of society, in all the manufacturing states of Europe. It is true, the wealth of a master-manufacturer is to be measured by the excess of the price he obtains for his produce over the cost of its production; but a master-manufacturer is not a nation. A nation consists not only of masters but of workmen; not only of consumers but producers. The latter class is by far the most numerous, the most important, the most likely to increase. If they are reduced to misery in consequence of the reduction of their wages by the introduction of machinery, the employment of juvenile or female labour, the immigration of foreign labourers, or any other cause, it is a poor compensation to say, that the profits of their employers have been greatly augmented at their expense. If the excess of the value of production above its cost, were either the measure, or even an important element in national wealth, Ireland, where the wages of field labour are 6d. a-day, and Poland, where they are 3d., should be the richest nations in the world, whereas they are notoriously the poorest. The real measure of national wealth is to be found, not in the excess of production above the consumption employed in it, but in the means of comfortable livelihood which their industry affords to the _whole_ classes of the community; and that is only to be attained where wealth is very generally distributed.