Individual natural entities (whether sentient or not, living or not), Andrew Brennan (1984, 2014) argues, are not designed by anyone to fulfill any purpose and therefore lack “intrinsic function” (i.e., the function of a thing that constitutes part of its essence or identity conditions). This, he proposes, is a reason for thinking that individual natural entities should not be treated as mere instruments, and thus a reason for assigning them intrinsic value. Furthermore, he argues that the same