More information is always beneficial, but at what point do we decide we know enough to move forward in a meaningful way? After all, we already have more than 60 years of research on the link between media violence and aggression and more than 3,000 studies, dozens of which focus specifically on violent video games. The consensus of the medical community is and has been that viewing entertainment violence can lead to increases in aggressive attitudes, values and behaviors, particularly in children. …

But why is Hollywood concerned about the potential impact of violent media content only in the wake of such tragedy? And why is it only temporary? The answer isn’t to delay release of films that glorify violence but to stop making them. It’s not to pull episodes of “Family Guy” and “American Dad” (only to air them a week later), but to reevaluate the messages they communicate to kids every day. …

But in Hollywood, talk is cheap and there is a fortune to be made by producing and distributing ever-more graphic, ever-more gruesome and ever-more grotesque violence. As the nation’s focus shifted beyond Columbine, Hollywood got back to business and the violence came creeping back — this time in greater quantity and degree than ever before. “Not our fault” was its response. “Blame the parents.”