As we live our lives, we repeatedly make decisions that shape our future circumstances and affect the sort of person we will be. When choosing whether to start a family, or deciding on a career, we often think we can assess the options by imagining what different experiences would be like for us. L. A. Paul argues that, for choices involving dramatically new experiences, we are confronted by the brute fact that we can know very little about our subjective futures. This has serious implications for our decisions. If we make life choices in the way we naturally and intuitively want to--by...