A lot of the comments here are replacing "aggression" in the title with violence. Yeah, maybe people aren't more likely to be aggressive on an individual level

A lot of the comments here are replacing "aggression" in the title with violence. Yeah, maybe people aren't more likely to be aggressive on an individual level from violent video games. A much better (but harder to answer question) is do violent video games cause society overall to be more violent? Is someone who played COD more likely to support military action? Or vote for a violent politician? Or join the military? These all contribute to violence in the world as a whole.