The sense that well-being remains elusive, transitory, and unevenly distributed is felt by the rich as well as the poor, and in all societies. To explore this condition of existential dissatisfaction, the anthropologist Michael Jackson traveled to Sierra Leone, described in a recent UN report as the "least livable" country in the world. There he revisited the village where he did his first ethnographic fieldwork in 1969-70 and lived in 1979. Jackson...