produce. If the exchangeable value of the annual produce, on the contrary, fail short of the annual consumption, the capital of the society must annually decay in proportion to this deficiency. The expense of the society in this case exceeds its revenue, and necessarily encroaches upon its capital. Its capital, therefore, must necessarily decay, and together with it the exchangeable value of the annual produce of its industry.

This balance of produce and consumption is entirely different from what is called the balance of trade. It might take place in a nation which had no foreign trade, but which was entirely separated from all the world. It may take place in the whole globe of the earth, of which the wealth, population, and improvement may be either gradually increasing or gradually decaying.