Perhaps in order to avoid these and other problems, Marya Schechtman proposes her Anthropological View as driven by the question of what units are the proper object of all of our person-related practical concerns.  As already noted, she thinks the only way to unite all of them is by focusing on the human animal, one that lives our form of life.  This allows her to say that the fetus is the same thing as the infant, which is the same as the teenager, the adult, and the demented grandparent, one individual treated as the same locus of a host of practical concerns over the course of that life.  This view effectively blocks the possibilities, raised above, of some concerns cutting across individual lives, but this may prevent the Anthropological View from being able to explain some features of commonsense morality that the interpersonal unities view can.