good or bad result, but which, among all the actions possible to volition at any moment, will produce the best total result. To assert that an action is a duty, is to assert that it is such a possible action, which will always, in certain known circumstances, produce better results than any other. It follows that universal propositions of which duty is predicate, so far from being self-evident, always require a proof, which it is beyond our present means of knowledge ever to give (89—92). But (3) all that Ethics has attempted or can attempt, is to shew that certain actions, possible by volition, generally produce better or worse total results than any probable alternative: and it must obviously be very difficult to shew this with regard to the total results even in a comparatively near future; whereas that what has the best results in such a near future, also has the best on the whole, is a point requiring an investigation which it has not received. If it is true, and if, accordingly, we give the name of ‘duty’ to actions which generally produce better total results in the near future than any possible alternative, it may be possible to prove that a few of the commonest rules of duty are true, but only in certain conditions of society, which may be more or less universally presented in history; and such a proof is only possible in some cases without a correct judgment of what things are good or bad in themselves—a judgment which has never yet been offered by ethical writers. With regard to actions of which the general utility is thus proved, the individual should always perform them; but in other cases, where rules are commonly offered, he should rather judge of the probable results in his particular case, guided by a correct conception of what things are intriniscally good or bad (93—100). (4) In order that any action may be shewn to be a duty, it must be shewn to fulfil the above conditions; but the actions commonly called ‘duties’ do not fulfil them to any greater extent than ‘expedient’ or ‘interested’ actions: by calling them ‘duties’ we only mean that they have, in addition, certain non-ethical predicates. Similarly by ‘virtue’ is mainly meant a permanent disposition to perform ‘duties’ in this restricted
