Furthermore: as soon as rent assumes the form of money-rent, and thereby the relationship between rent-paying peasant and landlord becomes a relationship fixed by contract — a development which is only possible generally when the world-market, commerce and manufacture have reached a certain relatively high level — the leasing of land to capitalists inevitably also makes its appearance. The latter hitherto stood beyond the rural limits and now carry over to the countryside and agriculture the capital acquired in the cities and with it the capitalist mode of operation developed — i.e., creating a product as a mere commodity and solely as a means of appropriating surplus-value. This form can become the general rule only in those countries which dominate the world-market in the period of transition from the feudal to the capitalist mode of production. When the capitalist tenant farmer steps in between landlord and actual tiller of the soil, all relations which arose out of the old rural mode of production are torn asunder. The farmer becomes the actual commander of these agricultural labourers and the actual exploiter of their surplus-labour, whereas the landlord maintains a direct relationship, and indeed simply a money and contractual relationship, solely with this capitalist tenant. Thus, the nature of rent is also transformed, not merely in fact and by chance, as occurred in part even under earlier forms, but normally, in its recognised and prevailing form. From the normal form of surplus-value and surplus-labour, it descends to a mere excess of this surplus-labour over that portion of it appropriated by the exploiting capitalist in the form of profit; just as the total surplus-labour, profit and excess over profit, is extracted directly by him, collected in the form of the total surplus-product, and turned into cash. It is only the excess portion of this surplus-value which is extracted by him from the agricultural labourer by direct exploitation, by means of his capital, which he turns over to the landlord as rent. How much or how little he turns over to the latter depends, on the average, upon the limits set by the average profit which is realised by capital in the non-agricultural spheres of production, and by the prices of non-agricultural production regulated by this average profit. From a normal form of surplus-value and surplus-labour, rent has now become transformed into an excess over that portion of the surplus-labour claimed in advance by capital as its legitimate and normal share, and characteristic of this particular sphere of production, the agricultural sphere of production. Profit, instead of rent, has now become the normal form of surplus-value and rent still exists solely as a form, not of surplus-value in general, but of one of its offshoots, surplus-profit, which assumes an independent form under particular circumstances. It is not necessary to elaborate the manner in which a gradual transformation in the mode of production itself corresponds to this transformation. This already follows from the fact that it is normal for the capitalist tenant farmer to produce agricultural products as commodities, and that, while formerly only the excess over his means of subsistence was converted into commodities, now but a relatively insignificant part of these commodities is directly used by him as means of subsistence. It is no longer the land, but rather capital, which has now brought even agricultural labour under its direct sway and productiveness.