which is used, of the premises, of the fuel and so on, in short the value of all the means of production necessary for baking. Under one condition alone could the value of any one commodity be strictly equal to _v + s_; if a man were to work in mid-air, without raw materials, without tools or workshop. But since all work on materials (material labour) presupposes means of production of some sort which themselves result from preceding labour, the value of this past labour is of necessity transferred to the new product. The process in question does not only take place in capitalist production; it is the general foundation of human labour, quite independent of the historical form of society. The handling of man-made tools is a fundamental characteristic of human civilisation. The concept of past labour which precedes all new labour and prepares its basis, expresses the nexus between man and nature evolved in the history of civilisation. This is the eternal chain of closely interwoven labouring efforts of human society, the beginnings of which are lost in the grey dawn of the socialisation of mankind, and the termination of which would imply the end of the whole of civilised mankind. Therefore we have to picture all human labour as performed with the help of tools which themselves are already products of antecedent labour. Every new product thus contains not only the new labour whereby it is given its final form, but also past labour which had supplied the materials for it, the instruments of labour and so forth. In the production of value, that is commodity production into which capitalist production also enters, this phenomenon is not suspended, it only receives a particular expression. Here the labour which produces commodities assumes a twofold characteristic: it is on the one hand useful concrete labour of some kind or other, creating the useful object, the value-in-use. On the other hand, it is abstract, general, socially necessary labour and as such creates value. In its first aspect it does what labour has always done: it transfers to the new product past labour, incorporated in the means of production employed, with this distinction only, that this past labour, too, now appears as value, as old value. In its second aspect, labour creates new value which, in capitalist terms, can be reduced to paid and unpaid labour, to _v + s_. Thus the value of every commodity must contain old value which has been transferred by labour _qua_ useful concrete labour from the means of production to the commodity, as well as the new value, created by the same labour _qua_ socially necessary labour merely as this labour is expended hour by hour.