There has been something of a change from Adam Smith,whose recourse in perplexity was to the guidance of " an unseen hand," to Mill and Cairnes, who formulated thelaws of "natural" wages and " normal" value, and the former of whom was so well content with his work as to say, " Happily, there is nothing in the laws of Value which remains for the present or any future writer to clear up: the theory of the subject is complete." * But the difference between the earlier and the later point of view is a difference of degree rather than of kind.