Speaking of the history of morality and moral judgments in historiography, Alister MacIntyre makes a pointed observation about plementary distinction that arises between what might be called “intellectual” and “social” history:

Abstract changes in moral concepts are always embodied in real, particular events. There is a history yet to be written in which the Medici princes, Henry VIII and Thomas Cromwell, Frederick the Great and Napoleon, Walpole and Wilberforce, Jefferson and Robespierre are understood as expressing their actions, often partially and in a variety of different ways, the very same conceptual changes which at the level of philosophical theory are articulated by Machiavelli and Hobbes, by Diderot and Condorcet, by Hume and Adam Smith and Kant. There ought not to be two histories, one of political and moral action and one of political and moral theorizing, because there were not two pasts, one populated only by actions, the other only by theories. Every action is the bearer and expression of more or less theory-laden beliefs and concepts; every piece of theorizing and every expression of belief is a political and moral action.

—After Virtue, 2d ed., p. 61

See also: Lord Acton, Lectures on Modern History (1906).