The easily recognized importance of such factors enables us to reject nihilism about the meaning of
life as well as the minimalist pursuit of slacker serenity. I have tried to show how it is possible to be
naturalistically normative about knowledge (chapters 2 and 4), the meaning of life (chapters 7 and 8),
and questions of right and wrong (chapter 9). Figure 10.1 provides a schematic summary of the use of
scientific evidence and theories to inform deliberation about the justification of practices through
their contributions to appropriate goals. We can use evidence to help us select theories and to identify
practices and goals, at the same time that evidence is influenced by theories, and practices and goals
are influencing each other.