Last year, I was asked by Glenfiddich whiskey to speak at a series of events they were holding with their consumers. The brief was to speak about ‘charisma’. The Cambridge dictionary defines charisma as “a special power that some people have naturally that makes them able to influence other people and attract their attention and admiration.” This was difficult. How do I speak on something that I find indefinable, especially when positioned as an ‘expert’ on this? Instead, having, at the time, recently read Susan Cain’s book, Quiet – The Power Of Introverts In A World That...