 Other views focus on the social constitution of the body. Foucault 1976, 1977a and Butler 1988, 1990, 1993, among others, hold that an adequate theory of the self involves the construction of bodies as much as it does the construction of mental states. And they argue that human bodies are largely products of discourse and the exercise of social power. However, in interpreting these views it is important to distinguish claims about the constituents of selves and bodies from claims about how kinds and categories are set up. At least to some extent, these are theories of how narratives and practices set up categories for classifying bodies (see sections  4.4  and  5.4).