structural:expansion, information:extraction
David Ricardo

David Ricardo (1772–1823) was born in London. By the age of 26, he had become a wealthy stock market trader, and bought himself a constituency seat in Ireland to gain a platform in the British parliament's House of Commons. Ricardo's best known work is On the Principles of Political Economy and Taxation (1817), which contains his critique of barriers to international trade and a description of the manner in which income is distributed in the population. Ricardo made a distinction between workers, who received a wage fixed to a level at which they could survive, the landowners, who earn a rent, and capitalists, who own capital and receive a profit, a residual part of the income.

If population grows, it becomes necessary to cultivate additional land, whose fertility is lower than that of already cultivated fields, because of the law of decreasing productivity. Therefore, the cost of the production of the wheat increases, as well as the price of the wheat: The rents increase also, the wages, indexed to inflation (because they must allow workers to survive) as well. Profits decrease, until the capitalists can no longer invest. The economy, Ricardo concluded, is bound to tend towards a steady state.