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How Militarizing Police Can Increase Violence

Does more military gear make cops more likely to act violent?

Long before the killing of Michael Brown and the subsequent protests in Ferguson, Missouri, which have brought with them countless images of heavily armored local authorities pointing guns at and firing tear gas and other nonlethal weapons at unarmed protesters, some were disturbed by what Washington Post journalist Radley Balko calls “the rise of the warrior cop” — that is, the increasing tendency of some local police forces to rely on military-style gear and tactics, even in situations that appear devoid of any real threat to officers’ safety.

The story of how this happened and the oftentimes tragic results have been well-told by Balko, the American Civil Liberties Union, and others. In short, there’s been a flood of drug-war and post-9/11 money that has helped outfit police departments, even towns where a single murder is an incredibly rare event, with gear that could help repel seasoned paramilitaries.

What’s less clear is how this gear changes the psychological dynamics of policing and crowd control. Is it true, as many people are arguing online, that “When you have a hammer, everything looks like a nail” — that is, that simply having military gear will make police more likely to act in an aggressive manner toward civilians? How does this change the relationship between police and civilians?

At the most specific level, these questions haven’t been studied empirically. But a great deal of social-psychological research, as well as important anecdotal evidence from law-enforcement specialists themselves, suggests that militarized policing can greatly inflame situations that might otherwise end peacefully.

The so-called “weapons effect” can partly explain what’s going on in Ferguson and elsewhere. The mere presence of weapons, in short, appears to prime more aggressive behavior. This has been shown in a variety of experiments in different lab and real-world settings.

“Theory underlying the weapons effect or similar kinds of phenomena would suggest that the more you fill the environment with stimuli that are associated with violence, the more likely violence is to occur,” said Bruce Bartholow, a University of Missouri social psychologist who has studied the weapons effect. Brad Bushman, a psychologist at Ohio State, agreed. “I would expect a bigger effect if you see military weapons than if you see normal weapons,” he said.

This isn’t just about a link between visual stimuli like guns and violence, however. It also has to do with the roles people adopt, with how they respond to the presence of others who may — or may not — mean them harm. To a certain extent, if you dress and treat people like soldiers facing a deadly enemy, they’ll act like it.

“This process isn’t necessarily good or bad, but depends on the extent to which the more militaristic role fits the situation,” said Craig Anderson, a psychologist at Iowa State, in an email. “When it doesn’t fit well, it is likely to lead to more judgment and behavior errors.” Maria Haberfeld, a professor at the John Jay College of Criminal Justice who has studied how police departments outfit themselves, said the dynamic could be particularly dangerous in the context of nonviolent protests like Ferguson (there was rioting and looting earlier this week, but there have also been widespread reports of nonviolent protests being broken up by police aggression).

“Military equipment is used against an enemy,” said Haberfeld. “So if you give the same equipment to local police, by default you create an environment in which the public is perceived as an enemy.” On the other side of these confrontations, this could have a negative effect on protesters. “We live in a democratic country, and we believe that this is our right to go out and exercise the right to [free speech],” she said. “And when you go out there and exercise that right and suddenly you are faced with soldiers — even though these are not soldiers, but police officers looking like soldiers — then something is triggered, definitely.”

Bushman said that meeting nonviolent protests with a militarized response is “really a bad idea. I can’t believe they’re doing it.” “It’s just really bad for the officers because they feel more powerful, more invincible, more militaristic, ready to attack,” he said. “And also, I think it elicits a response from the observers that, hey, this is war, and people become defensive and they have a fight/flight response.” The adoption of masks themselves in a militarized setting, on the part of police or protesters, can also contribute to violence by triggering senses of anonymity and what psychologists call deindividuation. “There’s all kinds of evidence in social psychology that that will lead people to do things that they wouldn’t do if they could be identified,” said Bartholow.

All this militarization, said Bartholow, can be contrasted “against the old kind of beat-cop model where people in the neighborhood know the police officers’ name and he’s kind of everybody’s buddy in a sense.”

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