8. A computer program product, comprising: a non-transitory computer readable storage medium having computer readable program code embodied therewith, where the computer readable program code when executed on a computer causes the computer 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 the determined differences between the expressive content of the grouped social media postings at the different degrees of social network separation.
14. The computer program product of claim 8 , where the computer readable program code when executed on the computer further causes the computer to: identify, among the different degrees of social network separation, a degree of separation at which to focus efforts to influence opinion change based upon a greatest deviation of opinion within the expressive content relative to a target configured opinion; and where, in causing the computer to render the determined differences between the expressive content of the grouped social media postings at the different degrees of social network separation, the computer readable program code when executed on the computer causes the computer to graphically render the identified degree of separation at which to focus the efforts to influence opinion change.