In the 1960s, the Rolling Stones sang: “You can't always get what you want / But if you try sometimes you might find / You get what you need.” Most people want success at love, work, and play, but do they really need it? Our merely wanting something does not show that it deserves to be wanted. People often have frivolous desires acquired from social contagion or advertising—for example,wanting the latest gadget or fashionable clothes. To provide a solid answer to the question of why life is worth living, we need to establish that some goals really are valuable, not just that many people value them. Hence the question of the meaning of life needs to move from the descriptive realms of psychology, neuroscience, and sociology into the normative realm of philosophy