David Brooks reviews a new book an applied philosophy: "For the past hundred years or so, we have lived in a secular age. That does not mean that people aren’t religious. It means there is no shared set of values we all absorb as preconscious assumptions. In our world, individuals have to find or create their own meaning. This, Dreyfus and Kelly argue, has led to a pervasive sadness. Individuals are usually not capable of creating their own lives from the ground up. So modern life is marked by frequent feelings of indecision and anxiety. People often lack the foundations upon which to make the most important choices."