DK << >> Chapter 1: The Commodity Page 136 In itself, an increase in the quantity of use-values constitutes an increase in material wealth. Two coats will clothe two men, one coat will only clothe one man, etc. Nevertheless, an increase in the amount of material wealth may correspond to a simultaneous fall in the magnitude of its value. [...] the same change in productivity which increases the fruitfulness of labour, and therefore the amount of use-values produced by it, also brings about a reduction in the value of this increased total amount, if it cuts down the total amount of labour-time necessary to produce the use-values. The converse also holds.