Loneliness is one of the greatest threats to our sense of well-being, affecting our health through our behaviors on social media, food consumption, and the like. One study suggests that nearly two-thirds of all people—regardless of age or gender—feel lonely at least some of the time. One British supermarket has created “talking tables” in their store cafés as a way to foster connection between people. Those looking for human interaction simply seat themselves at a table designated for that purpose, joining others or indicating a desire to be joined. Conversation ensues, providing a sense of connection and community.

The people of…