We make quick - and accurate - judgments of the people we interact with, and adjust how we talk to them accordingly. Hundreds of thousands of years of hardwired intuition and empathy guide our social interactions. Brands have been lacking this nuance - until now. A combination of data science and behavioural science allows brands to understand consumers’ personalities and talk to them in the best way. If, for example, their Amazon history shows they like dark chocolate and gin, talk to them in a blunter and swearier way.