I have selected these works as being enough, but not more than enough, to give a sufficient idea of the extremely different way in which writers, who are still considered by many people to be among the best worth reading on the subject, have dealt with it. No doubt, in some cases, other works, equally well worth reading, and equally typical of the sort of differences I want to emphasise, might be substituted for some of those I have mentioned; but these are, I think, as good as any for the purposes of illustration, and hardly one of them could be omitted without serious loss, unless some other work, typical of the same method of treatment, were substituted for it.
For guidance in his further reading, so far as writers no longer living are concerned, the reader may be referred to Sidgwick’s Outlines of the History of Ethics (Macmillan & Co.), from which he will be able to judge what other writers it is likely to be most profitable for him to study, and which is also well worth reading on its own account. And, if he wishes to become acquainted with the principal works on Ethics, which have been written by writers still living, I think I can hardly do better than recommend him to read, first of all, Dr. Hastings Rashdall’s Theory of Good and Evil (Clarendon Press, 1907). This book will, I think, give a fair idea of the sort of questions which are still being discussed at the present day, and it also contains references to the most important works of other living writers, sufficient to enable the reader to make his own choice of further reading.
For further explanation of the views advocated in the present work the reader may be referred to the author’s Principia Ethica (Cambridge University Press, 1903), which presents the same general view in a rather different form, and which also contains discussions on various points entirely omitted here from lack of space.