It is no more than to be expected, therefore, that Prof. Diehl should declare Rodbertus a pioneer of economic theory on the strength of his 'new theory of income' and of the distinction between the logical and the historical categories of capital (capital properly so-called in contrast to individual capital), that Prof. Adolf Wagner should call him the 'Ricardo of economic socialism', proving himself ignorant at once of Ricardo, Rodbertus and socialism alike. Lexis even judges that Rodbertus is at least the equal of 'his British rival' in power of abstract thinking, and by far his superior in 'virtuosity to lay bare the phenomena in their ultimate connections', in 'imaginative vitality', and above all in his 'ethical approach to economic life'. Rodbertus' real achievements in economic theory however, other than his critique of Ricardo's ground rent, his at times quite clear-cut distinction between surplus value and profit, his treatment of the surplus value as a whole in deliberate contrast with its partial manifestations, his critique of Smith's dogma concerning the analysis of commodities in terms of value, his precise formulation of the periodical character of the crises and his analysis of their manifestations--all these attempts to carry the investigation beyond Smith, Ricardo and Say, promising as such, though doomed to failure because of the confused basic concepts, are rather above the heads of Rodbertus' official admirers. As Franz Mehring already pointed out, it was Rodbertus' strange fortune to be lauded to heaven for his alleged prowess in economics by the same people who called him to task for his real merits in politics. This contrast between economic and political achievements, however, does not concern us here: in the realm of economic theory, his admirers built him a grand memorial on the barren field he had dug with the hopeless zeal of the visionary, while the modest beds where he had sown a few fertile seeds, were allowed to be smothered with weeds and forgotten.[276] It cannot be said that the problem of accumulation had on the whole been much advanced beyond the first controversy by this Prusso-Pomeranian treatment. If in the interim the economic theory of harmony had dropped from the level of Ricardo to that of a Bastiat-Schultze, social criticism had correspondingly declined from Sismondi to Rodbertus. Sismondi's critique of 1819 had been an historical event, but Rodbertus' ideas of reform, even on their first appearance, were a miserable regression--still more so on their subsequent reiteration. In the controversy between Sismondi on the one hand and Say and Ricardo on the other, one party proved that accumulation was impossible because of the crises, and therefore warned against full development of the productive forces. The other party proved that crises were impossible and advocated an unlimited development of accumulation. Though all argued from wrong premises, each was logically consistent.