About a year ago I wrote about Web 2.0 as a time machine for my generation, and my suspicion that "mine may be the last generation that has the experience of losing touch with friends." This concerned me because

when it comes to shaping identity, the ability to forget can be as important as the ability to remember. It's easy to implore people not to forget who they are; but sometimes, in order to become someone better, you need to forget a little bit.

Likewise,

Forgetting insults and painful events, we all recognize, is a pretty healthy thing for individuals: a well-adjusted person just doesn't feel the same shock over a breakup after ten years (if they can even remember the name of Whoever They Were), nor do they regard a fight from their childhood with anything but clinical detachment. Collectively, societies can also be said to make decisions about what they choose to remember, and how to act toward the past. Sometimes this happens informally, but has practical reasons: think of national decisions of avoid deep reflection on wars or civil strife, in the interests of promoting national unity and moving forward.

The idea that digital and human memory work differently, and that we fail to recognize the difference between the two at our peril, is something I've been writing about for a while. So I was very interested to see a review by Henry Farrell in Times Higher Education of Viktor Mayer-Schoenberger's new book Delete: The Virtue of Forgetting in the Digital Age. It sounds like a book I need to read… or at least footnote!

At its heart, his case against digital memory is humanist. He worries that it will not only change the way we organise society, but it will damage our identities. Identity and memory interact in complicated ways. Our ability to forget may be as important to our social relationships as our ability to remember. To forgive may be to forget; when we forgive someone for serious transgressions we in effect forget how angry we once were at them.

Delete argues that digital memory has the capacity both to trap us in the past and to damage our trust in our own memories. When I read an old email describing how angry I once was at someone, I am likely to find myself becoming angry again, even if I have since forgiven the person. I may trust digital records over my own memory, even when these records are partial or positively misleading. Forgetting, in contrast, not only serves as a valuable social lubricant, but also as a bulwark of good judgment, allowing us to give appropriate weight to past events that are important, and to discard things that are not. Digital memory – which traps us in the past – may weaken our ability to judge by distorting what we remember.

[To the tune of Sukhwinder Singh, "Marjaani Marjaani," from the album Saavn Celebrates Bollywood (I give it 3 stars).]