http://tags.library.upenn.edu/tag/aggressive_behavior+kids PennTags Feed http://tags.library.upenn.edu/makerecord/voyager/717 http://tags.library.upenn.edu/makerecord/voyager/717 Chapter 4, "It's Important to Feel Something When You Kill", discusses the evolution in violence in video games.  It explains why violent video games are popular, addictive, and dangerous.  Includes a very interesting section on video games as desensitizing killing simulators and military/law enforcement usage of them.