  Another strategy is to insist that many moral disagreements can after all be attributed to factors that are analogous to those that underlie scientific ones (e.g., Smith 1994, 155–161) or to related factors that are supposed to be especially pertinent to moral inquiry (for a rich account of both options, see Brink 1989, ch. 7). For example, it is often noted that moral disputes are frequently rooted in disagreement about non-moral facts (e.g., Boyd 1988, 213), such as when people have opposing views about the death penalty because of different beliefs about the effects of permitting it. Those cases do arguably not provide any particular problem for moral realism and can be seen as instances of disagreement which is due to a lack of evidence. A further distorting factor is self-interest, whose influence may make people resist plausible moral views just because those views represent them or the behavior they want to engage in as immoral. That mechanism may help to explain why there is more disagreement in ethics than in areas where self-interest is less of an issue (see Nagel 1986, 148; and Shafer-Landau 2006, 219 for this suggestion). Yet further examples are bias and prejudice, lack of imagination, and, as for example David Brink has stressed (1989, 197–210), an insufficient amount of systematic reflection. In specifically addressing the lack of convergence among ethicists, Derek Parfit has made the congenial suggestion that it is premature to draw antirealist conclusions from it, as secular moral reasoning has been pursued for a relatively short time (1984, 454). The suggestion is that fruitful moral inquiry has been constrained by religious influences in ways that do not promote truth-seeking, just as research about empirical issues was similarly hampered before the scientific revolution. According to Parfit, this means that it is not irrational to be hopeful about future convergence of the very same kind that occurs in the sciences (see also Wedgewood 2014 for a discussion of disagreement among philosophers). The list of available strategies could be extended, and the question, in the context of the assessment of some (but not all) arguments from moral disagreement, is what scope their application leaves for postulating any remaining ones.