  So it is not enough that we articulate the various possible  metaphysical units. We must also figure out a way to identify  which one we ought to target for ethics (or whether just one will do  the trick for all relevant forms of ethical theorizing). So in its  purely metaphysical guise, reductionism must settle merely for  presenting these four alternatives, remaining officially neutral on  which one the ethicists should adopt. This two-step process –  identifying the possible metaphysical units, then narrowing down the  list to the ethically significant metaphysical units – is often overlooked by those wishing to adopt metaphysical  conclusions in their normative theorizing, but both steps are  important (a notable exception to those who overlook this point is  Brink; see his 1990, 1997a, and 1997b).