But what does it matter whether GHP is put forward as a common creed or a specific thesis, it might be asked, given that Mill identifies himself as a utilitarian and thus espouses the principle himself? The short answer is that a common creed must be stated broadly or vaguely enough to be embraced by any utilitarian. A longer and more adequate answer would explain how GHP has to be glossed in order for it to best illustrate Mill's view. I cannot elaborate on this here; instead, I want to focus on what Mill takes to constitute the single opinion definitive of utilitarianism. What counts as the adoption of utility as a standard, and of what exactly is it a standard? Although his terminology varies, the doctrine Mill typically refers to as the Principle of Utility (PU) is axiological, not moral. PU is the conclusion of the argument in Chapter 4: that all and only happiness is intrinsically good. Taken in context, though, the footnote to 2.1 clearly refers to utility as a standard of conduct—of right and wrong action. Indeed, Mill proceeds to specify the single opinion constitutive of utilitarianism as the creed that happiness is the foundation of morality . He has already indicated that there are various ways to apply this standard, all of which count as utilitarian; but he then offers the famous "proportionality" statement of the Greatest Happiness Principle.
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