Sri Lanka, Sept. 14 -- There are moments when a brand simply seems to have the wind behind it. People rave about it, journalists want to write about it, and customers want to be associated with it. We increasingly talk about good vibes. It is an emotional shorthand for how a person, brand or institution makes us feel, often before we have stopped to examine the facts. And in an age of 60-second reels, fleeting attention and algorithms that reward emotion, those feelings can be remarkably powerful. This week on our BBC Radio 4 show, 'When It Hits the Fan,' my co-host, David Yelland and I looked at the growing business of engineering them. Marks & Spencer has spent the summer generating the kind of positive attention most consumer brands w...