1. A system, comprising: a output device; and a processor programmed to: identify, relative to a specified social network user for each of a plurality of social media postings, a degree of social network separation of a social network user that generated expressive content of the respective social media posting; group social media postings that comprise an equivalent identified degree of social network separation relative to the specified social network user; determine differences between the expressive content of the grouped social media postings at different degrees of social network separation; and render, via the output device, the determined differences between the expressive content of the grouped social media postings at the different degrees of social network separation.