Physicist Frank Wilczek's unique insights on the nature of reality

In June, at a conference set in the picturesque Italian town of Campagna, south-east of Naples, two physicists in a seemingly endless argument over a long-sought theory of fundamental reality caught my attention. From the sidelines, an unassuming figure politely interrupted them. "I've got a slide that might help. Can I put it up?" asked Frank Wilczek. The slide, concisely describing the realms in which this theory may act, swiftly ended the dispute.