has been mainly due to the tacit influence of a standard
not recognised. Although the non-existence of
an acknowledged first principle has made ethics not
so much a guide as a consecration of men’s actual
sentiments, still, as men’s sentiments, both
of favour and of aversion, are greatly influenced
by what they suppose to be the effects of things upon
their happiness, the principle of utility, or as Bentham
latterly called it, the greatest happiness principle,
has had a large share in forming the moral doctrines
even of those who most scornfully reject its authority.
Nor is there any school of thought which refuses to
admit that the influence of actions on happiness is
a most material and even predominant consideration
in many of the details of morals, however unwilling
to acknowledge it as the fundamental principle of
morality, and the source of moral obligation.
I might go much further, and say that to all those
a priori moralists who deem it necessary to
argue at all, utilitarian arguments are indispensable.
It is not my present purpose to criticise these thinkers;
but I cannot help referring, for illustration, to
a systematic treatise by one of the most illustrious
of them, the
Metaphysics of Ethics, by Kant.
This remarkable man, whose system of thought will
long remain one of the landmarks in the history of
philosophical speculation, does, in the treatise in
question, lay down an universal first principle as
the origin and ground of moral obligation; it is this:—’So
act, that the rule on which thou actest would admit
of being adopted as a law by all rational beings.’
But when he begins to deduce from this precept any
of the actual duties of morality, he fails, almost
grotesquely, to show that there would be any contradiction,
any logical (not to say physical) impossibility, in
the adoption by all rational beings of the most outrageously
immoral rules of conduct. All he shows is that
the
consequences of their universal adoption
would be such as no one would choose to incur.
On the present occasion, I shall, without further
discussion of the other theories, attempt to contribute
something towards the understanding and appreciation
of the Utilitarian or Happiness theory, and towards
such proof as it is susceptible of. It is evident
that this cannot be proof in the ordinary and popular
meaning of the term. Questions of ultimate ends
are not amenable to direct proof. Whatever can
be proved to be good, must be so by being shown to
be a means to something admitted to be good without
proof. The medical art is proved to be good,
by its conducing to health; but how is it possible
to prove that health is good? The art of music
is good, for the reason, among others, that it produces
pleasure; but what proof is it possible to give that
pleasure is good? If, then, it is asserted that
there is a comprehensive formula, including all things
which are in themselves good, and that whatever else
is good, is not so as an end, but as a mean, the formula