There have already been more than 300 mass shootings in the United States this year—the latest at a 4th of July parade in the Highland Park suburb of Chicago. That shooting left seven dead, including both parents of a 2-year old toddler, and dozens injured – among them an 8-year old with a severed spinal cord, leaving him paralyzed from the waist down for the rest of his life. As the United States reckons with these increasingly common public massacres, many blame mental illness as the fundamental cause. The reality, however, is that people with mental illness account for a very small proportion of perpetrators of mass shootings in the United States, says one expert.

Humans tend to form groups, which often find themselves in conflict with rival groups. But why do people show such a ready tendency to harm people in opposing groups? A new study used brain imaging to explain why humans are aggressive toward rival groups.

Racially or ethnically motivated violent extremists are using the debate around women’s reproductive rights to promote racist and extremist agendas.

Every year, extremists overwhelmingly use guns to carry out their deadly attacks. In any given year, more people are killed by extremists who use firearms than those who choose any other weapon. Over the past decade, shootings accounted for 75 percent of the deaths at the hands of extremists.

Ten months into their extremist theocratic rule in Afghanistan, the Taliban are facing growing resistance in different parts of the country. Contrary to the Taliban’s claim that an atmosphere of calm and security prevails in Afghanistan, there has been growing resistance to their rule, led by the National Resistance Front (NRF), headed by Ahmad Massoud—the son of the legendary Commander Ahmad Shah Massoud.

When social media exploded in the mid-2000s, retweeting, sharing and liking posts appeared to give average citizens the power to share their opinions far and wide. The problem, according to social psychologist Jonathan Haidt, is that online social networks didn’t really end up giving everyone the voice that many thought it would. “It empowered four groups who take advantage of the viral dynamics of social media. That is the far right, the far left, trolls and Russian intelligence,” he says.

Researchers found that the network of support on social media for al-Shabaab and Islamic State extended across several platforms, including decentralized messaging applications such as Element and RocketChat, and encrypted messaging platforms such as Telegram, as well as Twitter, YouTube and Facebook. 

South African court convicts the leader of an extremist group planning to use bioweapons to bring about, in his words, “black genocide” as part of a broader effort to re-establish the country’s apartheid regime.

Police have been accused of failing to keep tabs on a racist killer during one of Germany’s worst-ever far-right shootings. Police say they had to proceed cautiously.