Thus we see that though there are for instance in the England of today a variety of classes, and a variety of corresponding codes of public opinion and morality, one of these codes, namely that of the ruling class whose watchword is property, is strongly in the ascendant. And we may fairly suppose that in any nation from the time when it first becomes divided into well-marked classes this is or has been the case. In one age—the commercial age—the code of the commercial or money-loving class is dominant; in another—the military—the code of the warrior class is dominant; in another—the religious—the code of the priestly class; and so on.

Defence of criminals: A criticism of morality (1889)