Too Much Information

Too Much Information

Understanding What You Don't Want to Know

By Cass R. Sunstein

How information can make us happy or miserable, and why we sometimes avoid it and sometimes seek it out.





How information can make us happy or miserable, and why we sometimes avoid it and sometimes seek it out.

How much information is too much? Do we need to know how many calories are in the giant vat of popcorn that we bought on our way into the movie theater? Do we want to know if we are genetically predisposed to a certain disease? Can we do anything useful with next week's weather forecast for Paris if we are not in Paris? In Too Much Information, Cass Sunstein examines the effects of information on our lives. Policymakers emphasize “the right to know,” but Sunstein takes a different perspective, arguing that the focus should be on human well-being and what information contributes to it. Government should require companies, employers, hospitals, and others to disclose information not because of a general “right to know” but when the information in question would significantly improve people's lives.

Sunstein argues that the information on warnings and mandatory labels is often confusing or irrelevant, yielding no benefit. He finds that people avoid information if they think it will make them sad (and seek information they think will make them happy). Our information avoidance and information seeking is notably heterogeneous—some of us do want to know the popcorn calorie count, others do not. Of course, says Sunstein, we are better off with stop signs, warnings on prescription drugs, and reminders about payment due dates. But sometimes less is more. What we need is more clarity about what information is actually doing or achieving.


$27.95 T ISBN: 9780262044165 264 pp. | 5.375 in x 8 in 5 figures


$19.95 T ISBN: 9780262543910 264 pp. | 5.375 in x 8 in 5 figures


  • An accessible treatise on the need to ensure that information improves citizens' well-being with a narrative [that] is clear and relatable.

    Kirkus Reviews

  • Sunstein writes in clear, accessible language throughout. This balanced and well-informed take illuminates an obscure but significant corner of government policy making.

    Publishers Weekly

  • Sunstein's writing walks the talk. He is economical, direct and very easy to read. The book moves quickly and covers a lot of ground.


  • “The book actually delivers something stranger and more interesting than the announced thesis: a tour of human biases that end up creating 'behavioral market failures.' Too Much Information doesn't replace that generational certainty with a new one, but it does make it impossible to continue regarding information disclosure as an uncomplicated good.”

    New York Times Book Review

  • "Sunstein's book is an invaluable font of information about the many burdens of disclosing too much information."



  • Classic Cass Sunstein: Keen insights and bracingly clear prose fill every page. The chapter on Facebook alone is a compelling reason to read Too Much Information.

    Robert H. Frank

    H. J. Louis Professor of Management and Professor of Economics, Cornell Johnson Graduate School of Management; author of Under the Influence: Putting Peer Pressure to Work

  • Once again Cass Sunstein shows that evaluating policy questions with evidence and rigor not only leads to better governance but can be intellectually exhilarating.

    Steven Pinker

    Johnstone Professor of Psychology, Harvard University; author of Enlightenment Now

  • Years at the White House uniquely prepared Cass—a world-renowned behavioral scientist—to write this important book. His must-read arguments about when governments should and should not require companies to disclose information draw on entertaining anecdotes supported by rigorous research.

    Katy Milkman

    Professor, The Wharton School of the University of Pennsylvania; host of the Choiceology podcast

  • Cass Sunstein offers a unique and incredibly valuable perspective on information and how it affects people's choices, presented in a masterful way.

    Linda Thunstrom

    Assistant Professor, Department of Economics, University of Wyoming

  • Sunstein offers an endless supply of thought-provoking and accessible examples to highlight the fascinating questions at the heart of information disclosure policy. This book changed how I think about what information to seek out in my own life.

    Jacob Goldin

    Associate Professor of Law, Stanford Law School