When the internet was new, its early enthusiasts hoped it would emulate the greatest serendipity machine ever invented: the city. The modern metropolis, as it arose in the 19th century, was also an attempt to organise an exponential increase, this one in population. Artists and writers saw it as a giant playground of discovery, teeming with surprise encounters. The flâneur was born: one who wanders the streets with purpose, but without a map.

… some of our most serendipitous spaces are under threat from the internet. Wander into a bookshop in search of something to read: the book jackets shimmer on the table, the spines flirt with you from the shelves. You can pick them up and allow their pages to caress your hands. You may not find the book you wanted, but you will walk out with three you didn’t.

… serendipity, on the other hand, is, as Zuckerman says, “necessarily inefficient”. It is a fragile quality, vulnerable to our desire for convenience and speed. It also requires a kind of planned vagueness. Digital systems don’t do vagueness very well, and our patience
with it seems to be fading.