The good news is that we have amazing tools at hand, and marvellous trainers. The irony of today is that we no longer have our spaces in which to gather. This is why the resurrection of the squatters’ movements in large cities is of the upmost urgency.

Digital intermediation could help offer this kind of access to what Zacka calls “the lively and diverse intermingling of strangers in the public arena” and what the urban planner Jane Jacobs described as the “great and exuberant richness of differences and possibilities, many of these unique and unpredictable—and all the more valuable because they ... See more