 J. S. Mill (1874, 164–165) argued that we can explain normative principles without making any reference to God. He contends that the “feeling of obligation” stems from “something that the internal conscience bears witness to in its own nature,” and thus the moral law, unlike human laws, “does not originate in the will of a legislator or legislature external to the mind.” Doubtless Mill had in mind here such normative logical principles as “it is wrong to believe both p and not-p at the same time.” Mill argues that such normative principles hold without any requirement for an “authority” to be their ground, and he thinks this is plausible for the case of moral principles as well. Mill’s view is plausible at least for some normative principles, though some theists have argued that metaphysical naturalists have difficulty in explaining any kind of normativity (see Devine 1989, 88–89). However, even if Mill is correct about normativity in general, it does not follow that his view is correct for moral obligations, which have a special character. An obligation has a special kind of force; we should care about complying with it, and violations of obligations appropriately incur blame (Adams 1999, 235). If I make a logical mistake, I may feel silly or stupid or embarrassed, but I have no reason to feel guilty, unless the mistake reflects some carelessness on my part that itself constitutes a violation of a moral obligation. Adams argues that “facts of obligation are constituted by broadly social requirements.” (ibid, 233) For example, the social role of parenting is partly constituted by the obligations one assumes by becoming a parent, and the social role of citizen is partly constituted by the obligations to obey the laws of the country in which one is a citizen.