Robert Malthus: Christian Moral Scientist, Arch-Demoralizer or Implicit Secular Utilitarian?

John Maynard Keynes, in a biographical essay that is as remarkable for the insight it provides into his own thinking as for what it says about its subject, described the trajectory of Malthus's intellectual career as follows: ‘from being a caterpillar of a moral scientist and chrysalis of an historian, he could at last spread the wings of his thought and survey the world as an economist’. Malthus himself had resisted this conclusion in the introduction to his Principles of Political Economy — meant as a riposte to David Ricardo's way of proceeding — when he stated that ‘the science of political economy bears a nearer resemblance to the science of morals and politics than to that of mathematics’. For understandable reasons, however, some modern economists find Keynes's characterization more attractive, particularly when it also allows them to regret the fact that the free flight of the positive economist in Malthus was often impeded by historical and moral residues left over from earlier existences. By adopting this position they are able to discount awkward problems relating to the historical origins and professional identity of their discipline — those problems connected with Malthus's religious beliefs and theological standpoint that have to be confronted when his explicit claims as a Christian moral scientist are taken seriously. Lack of sympathy on the part of economists when faced with the moral and theological dimensions of Malthus's writings has a long history that goes back to Ricardo, who criticized his friend's confusion, as he saw it, of moral and economic considerations. James Mill, as always, was more outspoken in regretting the intellectual fetters that inevitably went with Malthus's clerical status. Some economic demographers, in modern times, have also criticized Malthus for intermingling ‘moralistic and scientific aims almost inextricably’, thereby imparting what they regard as an untestable or tautological air to his exposition of the population principle.