It would continue to decrease indefinitely, until it disappeared altogether, were it not that there is a limit to the process: after a certain point, in fact, industrial profits will be so low that it will become impossible to provide work for new workers; for lack of additional wages, the labour force will no longer be able to grow, and the population will remain constant; it will no longer be necessary to clear and cultivate fresh tracts of land even more infertile than the previous ones; ground rent will reach a ceiling and will cease to exert its customary pressure upon industrial profits, which will then become stabilized.