reason for the universal enforcement, by legal or social sanctions, of actions generally useful. It is undoubtedly well to punish a man, who has done an action, right in his case but generally wrong, even if his example would not be likely to have a dangerous effect. For sanctions have, in general, much more influence upon conduct than example; so that the effect of relaxing them in an exceptional case will almost certainly be an encouragement of similar action in cases which are not exceptional.
The individual can therefore be confidently recommended always to conform to rules which are both generally useful and generally practised. In the case of rules of which the general observance would be useful but does not exist, or of rules which are generally practised but which are not useful, no such universal recommendations can be made. In many cases the sanctions attached may be decisive in favor of conformity to the existing custom. But it seems worth pointing out that, even apart from these, the general utility of an action most commonly depends upon the fact that it is generally practised: in a society where certain kinds of theft are the common rule, the utility of abstinence from such theft on the part of a single individual becomes exceedingly doubtful, even though the common rule is a bad one. There is, therefore, a strong probability in favour of adherence to an existing custom, even if it be a bad one. But we cannot, in this case, assert with any confidence that this probability is always greater than that of the individual’s power to judge that an exception will be useful; since we are here supposing certain one relevant fact—namely, that the rule, which he proposes to follow, would be better than that which he proposes to break, if it were generally observed. Consequently the effect of his example, so far as it tends to break down the existing custom, will here be for the good. The cases, where another rule would certainly be better than that generally observed, are, however, according to what was said above, very rare; and cases of doubt, which are those which arise most frequently, carry us into the next division of our subject.
100. (β) This next division consists in the discussion of the method by which an individual should decide what to do with regard to possible actions of which the general utility
