The Graham family’s sale of the Washington Post to Amazon.com Inc. founder Jeff Bezos has prompted intense discussion of the future of journalism. That discussion has yet to focus on a remarkable feature of the Post and other old-fashioned newspapers: They provide people with a great deal of content that they wouldn’t have chosen in advance.

Newspapers create what we might call an architecture of serendipity, in which readers encounter all sorts of stories, facts, ideas and opinions that they didn’t select. Much of what they encounter seems boring, irritating, wrong or offensive, but on occasion it turns out to be surprising, delightful, alarming, important and even life-changing.

A lot can be said on behalf of serendipity. In your daily newspaper, you might learn about a new book -- on neuroscience, say, or folk music -- and, to your great surprise, it might pique your interest and broaden your horizons. You might run into a story on how to improve your health or save for retirement, and it might lead you to alter your habits, even if you don’t much like thinking about your health or your retirement.

You might see a story on Syria, and it might move you, maybe even alter your life, even though you couldn’t have imagined yourself being interested in Syria. Well-run newspapers offer stories that intrigue, entertain and affect readers who come across those stories only by happenstance, not because they ordered them in advance.

Desiring Serendipity

An architecture of serendipity seems old-fashioned today, an artifact of the technological limitations of a bygone era. The wave of the future is an architecture of control, through which consumers get to see, read and hear exactly what they want and avoid what they don’t want. Modern technologies make it easy for providers of goods and services to engage in personalization, which means they can tailor their products to people’s specific tastes.

Bezos has mastered this point. Amazon learns what you like, and it makes recommendations for you based on what you like. Those recommendations can be eerily good. In 1998, Bezos made the point explicitly (and to the Washington Post, no less): “If we have 4.5 million customers, we shouldn’t have one store. We should have 4.5 million stores.”

Can’t the same be said of newspapers? If the Post has 19 million readers, could it have 19 million newspapers? In 1995, Nicholas Negroponte, a technology specialist at the Massachusetts Institute of Technology, prophesied the emergence of the Daily Me -- a newspaper in which each person selected the stories that he wanted and screened out those that he didn’t.

In the newspaper business, complete personalization hasn’t yet arrived, but it may be on its way. For example, Facebook Inc. has created a news feed, with a secret algorithm, that uses your previous clicks to make selections for you. Mark Zuckerberg has said that the feed will operate as a “personalized newspaper.” Then there’s News360, an application that monitors what you choose to read and, “by learning what you enjoy, brings you content that you’ll find interesting and important.”

If he wishes, Bezos could easily take the Washington Post in this direction. A redesigned website, or an app, might create headlines and sort stories, ideas and opinions on the basis of people’s previous choices. If you are bored by politics, or if new science-fiction movies are what most interest you, then Your Post could be set up accordingly. Why shouldn’t people see what they want?

The best answer is that in communications, as in daily life, serendipity is highly desirable -- an important part of freedom and self-government, not an obstacle to them. Those who read only what they identify in advance end up narrowing their horizons; they may create echo chambers of their own design.

Social Glue

This is a social problem, not merely an individual one. When like-minded people speak only with one another, they tend to go to extremes, thus aggravating political polarization. An architecture of serendipity can reduce that effect. It can also create a kind of social glue, by creating common understandings and experiences for members of a highly diverse nation.

It is ironic that old-fashioned newspapers served some of their most important social functions only because of technological limitations, which prevented them from giving their customers only what they want. Those limitations are a thing of the past. In 20 years, daily newspapers, including the Washington Post, will likely look a lot different from how they look today. Whatever their emerging form, it is critical, for individuals and societies alike, that they continue to provide readers with the experience of serendipity.

(Cass R. Sunstein, the Robert Walmsley University professor at Harvard Law School, is a Bloomberg View columnist. He is the former administrator of the White House Office of Information and Regulatory Affairs, the co-author of “Nudge” and author of “Simpler: The Future of Government.”)

To contact the writer of this article: Cass R. Sunstein at csunstei@law.harvard.edu.

To contact the editor responsible for this article: Katy Roberts at kroberts29@bloomberg.net.