One main object of this book may, then, be expressed by slightly changing one of Kant’s famous titles. I have endeavoured to write “Prolegomena to any future Ethics that can possibly pretend to be scientific.” In other words, I have endeavoured to discover what are the fundamental principles of ethical reasoning; and the establishment of these principles, rather than of any conclusions which may be attained by their use, may be regarded as my main object. I have, however, also attempted, in Chapter VI, to present some conclusions, with regard to the proper answer of the question “What is good in itself?” which are very different from any which have commonly been advocated by philosophers. I have tried to define the classes within which all great goods and evils fall; and I have maintained that very many different things are good and evil in themselves, and that neither class of things possesses any other property which is both common to all its members and peculiar to them.
In order to express the fact that ethical propositions of my first class are incapable of proof or disproof, I have sometimes followed Sidgwick’s usage in calling them “Intuitions.” But I beg it may be noticed that I am not an “Intuitionist,” in the ordinary sense of the term. Sidgwick himself seems never to have been clearly aware of the immense importance of the difference which distinguishes his Intuitionism from the common doctrine, which has generally been called by that name. The Intuitionist proper is distinguished by maintaining that propositions of my second class—propositions which assert that a certain action is right or a duty—are incapable of proof or disproof by any enquiry into the results of such actions. I, on the contrary, am no less anxious to maintain that propositions of this kind are not “Intuitions,” than to maintain that propositions of my first class are Intuitions.
Again, I would wish it observed that, when I call such propositions “Intuitions,” I mean merely to assert that they are incapable of proof; I imply nothing whatever as to the manner or origin of our cognition of them. Still less do I imply (as most Intuitionists have done) that any proposition whatever is true, because we cognise it in a particular way or by the exercise of any particular faculty: I hold, on the contrary, that in every way in which it is possible to cognise a true proposition, it is also possible to cognise a false one.
When this book had been already completed, I found, in Brentano’s Origin of the Knowledge of Right and Wrong,1 opinions far more closely resembling my own, than those of any other ethical writer with whom I am acquainted. Brentano appears to agree with me completely (1) in regarding all ethical propositions as defined by the fact that they predicate a single unique objective concept; (2) in dividing such propositions sharply into the same two kinds; (3) in holding that the first kind are incapable of proof; and (4) with regard to the kind of evidence which is necessary and relevant to the proof of the second kind. But he regards the fundamental ethical concept as being, not the simple one which I denote by “good,” but the complex one which I have taken to define “beautiful”; and he does not recognise, but even denies by implication, the principle which I have called the principle of organic unities. In consequence of these two differences, his conclusions as to what things are good in themselves, also differ very materially from mine. He agrees, however, that there are many different goods, and that the love of good and beautiful objects constitutes an important class among them.
I wish to refer to one oversight, of which I became aware only when it was too late to correct it, and which may, I am afraid, cause unnecessary trouble to some readers. I have omitted to discuss directly the mutual relations of the several different notions, which are all expressed by the word “end.” The consequences of this omission may perhaps be partially avoided by a reference to my article on “Teleology” in Baldwin’s Dictionary of Philosophy and Psychology.
If I were to rewrite my work now, I should make a very different, and I believe that I could make a much better book. But it may be doubted whether, in attempting to satisfy myself, I might not merely render more obscure the ideas which I am most anxious to convey, without a corresponding gain in completeness and accuracy. However that may be, my belief that to publish the book as it stands was probably the best thing I could do, does not prevent me from being painfully aware that it is full of defects.
Preface to the Edition
This book is now reprinted without any alteration whatever, except that a few misprints and grammatical mistakes have been corrected. It is reprinted, because I am still in agreement with its main tendency and conclusions; and it is reprinted without alteration, because I found that, if I were to begin correcting what in it seemed to me to need correction, I could not stop short of rewriting the whole book.
Principia Ethica
I
The
