Time Biases: A Theory of Rational Planning and Personal Persistence. Oxford University Press, 2018.
Should you care less about your distant future? What about events in your life that have already happened? How should the passage of time affect your planning and assessment of your life? Most of us think it is irrational to ignore the future but completely harmless to dismiss the past — especially if past events have no lingering effect. But this book argues that prudential rationality requires temporal neutrality: a properly self-interested person does not engage in any kind of temporal discounting. The book draws on puzzles about real-life planning to build the case for temporal neutrality. How much should a young person save for retirement? Does it make sense to cryogenically freeze your brain after death? How much should you ask to be compensated for a past injury? Would radical climate change make your life meaningless? Sullivan considers what it is for you to be a person extended over time, how time affects our ability to care about ourselves, and all of the ways that our emotions might bias our rational planning. Drawing substantially from work in social psychology, economics and the history of philosophy, the book offers a systematic new theory of rational planning.
Matt Teichman at UChicago taped an episode of the Elucidations podcast about the project.
Tim Campbell recently reviewed Time Biases in The NDPR (Apr 2019). He writes: “The book will be of interest to anyone wishing to gain a deeper philosophical and scientific understanding of their own patterns of prudential concern and planning behavior, as well as bigger questions concerning life, death, and meaning. The book is well-argued, and stylistically, it is a welcome departure from the dryness that is characteristic of much of analytic philosophy.”