Ten years ago, during the course of my research into the Tata Group, I interviewed one of the group’s grand old men, R.K. Krishna Kumar. When I met him he was head of Tata Global Beverages, but he had been involved with many companies in the group over the years.  I asked him, as I asked everyone, what he thought the values of the Tata brand were. He did not answer immediately. Instead he gazed out the window for a while, steepling his fingers, and it was perhaps five seconds or so before he...