The nearer to our time the economists whom we have to judge, the more severe must our judgment become. For while Smith and Malthus found only scattered fragments, the modern economists had the whole system complete before them: the consequences had all been drawn; the contradictions came clearly enough to light; yet they did not come to examining the premises, and still accepted the responsibility for the whole system. The nearer the economists come to the present time, the further they depart from honesty. With every advance of time, sophistry necessarily increases, so as to prevent economics from lagging behind the times. This is why Ricardo, for instance, is more guilty than Adam Smith, and McCulloch and Mill more guilty than Ricardo.

F. Engels