Theses
The author presents three theses:
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"It is not profitable for us at present to do moral philosophy; that should be laid aside at any rate until we have an adequate philosophy of psychology, in which we are conspicuously lacking."
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"Concepts of obligation, and duty — moral obligation and moral duty, that is to say — and of what is morally right and wrong, and of the moral sense of "ought," ought to be jettisoned if this is psychologically possible; because they are survivals, or derivatives from survivals, from an earlier conception of ethics which no longer generally survives, and are only harmful without it."
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"The differences between the well-known English writers on moral philosophy from Sidgwick to the present day are of little importance."
Read more about this topic: Modern Moral Philosophy