Federal prosecutors have started describing some crimes as the work of "nihilistic violent extremists." One court filing described them as criminals who act "in furtherance of political, social, ...

The killing of far-right influencer Charlie Kirk last month by a 22-year-old suspect has brought into focus the epidemic of gun violence in the United States. While Kirk was a victim of political ...

A Russian court has declared Pussy Riot an extremist organization. What does this mean in practice? To begin with, it means that if you now write the word “Riot” next to the word “Pussy” in Russia, ...