Kim Arnold has taken up the baton from our previous column authors. This issue: 8 out of 10 cats – how to persuade people to do what you want

I hadn’t clicked so fast since online supermarket, Ocado, released delivery slots during lockdown. The email that dropped into my inbox a few weeks ago was irresistible. From a well-known clothes store, its title was simply: See what other people are buying. On autopilot, I tore open the email, dying to know what other people were hoovering up right now (I felt so cut off...