While narcissism is a personality disorder, psychologists remain curious about how it can manifest physically. According to a thorough analysis of 437 studies on narcissism around the world, there appears to be a strong correlation between narcissism and aggression — regardless of gender, age, and country of residence. The analysis was published in the journal Psychological Bulletin this week.

This week, a shooting attack at a grocery store in Boulder, Colo., left 10 people dead. Just days earlier, eight people were fatally shot in a rampage targeting spas in the Atlanta area. As with almost every mass shooter in recorded U.S. history, both of the suspects in the recent attacks are men.

Michael Paterniti, who reported from Columbine for GQ in 1999, leads us from the tragedy there, to the unspeakable horrors at Sandy Hook, to a recent 10-day stretch that suffered 14 mass shootings, including San Bernardino. This is the story of those 10 days, the new and relentless strain of gun violence in America, and the desperate need for us not to look away.

Even before the recent mass shootings, violent crime was surging to its highest rate in 30 years. Patrick Sharkey illuminates what’s happening.

Robert Aaron Long, 21, charged with murdering eight victims, six of whom were Asian women, at three Atlanta-area massage parlors, told police that he carried out the killings to eliminate the temptations that fed his sexual addiction. His church, Crabapple First Baptist Church, in Milton, Georgia, which opposes sex outside of marriage, issued a statement condemning the shootings as "unacceptable and contrary to the gospel."

B movies often tell more honest stories about our society than finely calibrated award-season films do.

As the United States struggles to contain the coronavirus pandemic and attendant economic disruption, another problem may be looming – murder rates have risen in many of America’s largest cities.

Protests in Portland, Oregon have been a nightly occurrence for more than 50 days, but one man hadn't attended any until Saturday night. Navy veteran Chris David, 53, told CNN over the phone Sunday that he had never been to a protest, but felt "enraged" when he saw federal officers on the scene and wanted to ask them what they were doing there.

Amid calls to rethink policing, body cameras remain a popular reform tool. But they remain locked within a larger system that resists transparency and accountability.

Peter’s work suggests that peaks of violence in the US work on a 50-year cycle, with the next state of upheaval set to hit humanity in 2020. It’s sort of like that 2012 Mayan-apocalypse stuff, except Peter’s theory is the result of the hard work of a modern, living, and well-respected scientist rather than something hippies like to talk about while taking heavy psychedelic drugs. We spoke to Peter to find out what’s supposedly going to make the US descend into a horrifying, dystopian pit of violence in eight years’ time.

Police in riot gear swinging batons. Plumes of tear gas. Protesters on their knees, pepper-sprayed in the face. Rubber bullets shot from moving cars. Such scenes have played out in some 75 cities across the US after the death of George Floyd in police custody in Minneapolis on May 25. US president Donald Trump has called for authorities to shut down protests with tougher policing, but he’s wrong. Decades of research show the right way to police a protest is to avoid excess force, remain calm, communicate transparently, and constantly negotiate.

Racism against Asian Americans has surged as the coronavirus sweeps the U.S., with reports of hate crimes averaging approximately 100 per day, according to Rep. Judy Chu (D-Calif.). Speaking live on MSNBC on Tuesday, Chu discussed the increase in assaults on Asians in the U.S. over misinformation regarding the coronavirus. She confirmed “at least 1,000 hate crimes incidents being reported against Asian Americans” after the pandemic arrived stateside.

I learned violence from my parents. They showed me that if you want something and they won’t give it to you, then beat it out of them. My dad beat my mom in the house when he didn’t get he wanted. My mom beat us in the house when she didn’t get what she wanted. So I inflicted physical violence on the next person to get what I want.

Al Noor mosque, Linwood Mosque, Christchurch, New Zealand, March 15, 2019: A gunman shoots dead 50 people and wounds more than 40 at two New Zealand mosques, some as they were kneeling at prayer.

A deadly shooting on two houses of worship in New Zealand left at least 49 people dead. The alleged gunman targeted Muslims. The U.S. has seen a rise in violence by white supremacists, including the murders of 11 people at a Pittsburgh Synagogue last fall. There was also a deadly clash at a white nationalist rally in Charlottesville, Virginia in 2017, the murders of nine people at a church in Charleston in 2015 and the deaths of six at a Sikh temple in Wisconsin in 2012.

Teenagers who play violent video games are no more prone to real world aggressive behaviour than their peers, according to UK researchers who say their negative effects have been overstated. Fears that gory games like Grand Theft Auto and Call of Duty might make children think on-screen behaviours are acceptable have been a major concern for parents and policy makers for years. Last year President Donald Trump said violent games were “shaping young people’s thoughts” in the wake of the Marjory Stoneman Douglas high school shooting in Parklands, Florida.

On December 14, 2012, a gunman walked into Sandy Hook Elementary School in Newtown, Connecticut, and killed 20 children, six adults, and himself. Here’s the data behind these tragic events.

In an echo of Latin America’s “Dirty Wars,” tens of thousands of people have vanished in Mexico, leaving mothers behind to search for their corpses. This time the violence, linked to criminal networks, is more complex and more intractable.

Fans of this violent music report feelings of transcendence and positive emotions; psychologists want to learn why

A mob of about 100 people in the central Mexican state of Hidalgo doused a detective with gasoline and burned him to death, according to local officials. The Hidalgo state prosecutors’ office said the crowd attacked local police in the town of Metepec on Thursday and took the detective and three other men captive. They severely beat the men and burned the detective after dousing him with fuel. It was unclear if he was on duty or if they knew he was a detective.