A weakened central power makes it easier for violent groups - like highway bandits, local militias and armed bands of jihadists - to emerge and thrive.
Rural Westerners have been stereotyped as angry ranchers who hate government. But for every gun-wielding militia member, there are many others who work collaboratively to protect what they value.
The story of this video game speaks to what seems a powerful political moment, of an American nation literally at war with itself.
President Trump proposes to send the National Guard to protect the southern US border. Instead of searching for your old civics textbook, here's a pocket history of the soldiers in the spotlight.
The radical right has a keen sense of its own history, and the violence of the 1990s is still fresh in its memory.
Since 2011, Libya has been trying to fashion itself into a functioning democratic state – but instead, it's still mired in violent chaos.
A geography professor reports from the front lines of the Malheur occupation. Despite strong local opposition to occupiers, he foresees more conflicts to come.
Behind the armed takeover of the Malheur National Wildlife Refuge in Oregon lie decades of controversy over federal control of public land in western states.
The violent American militias of the 1990s faded from view long ago – but have they begun coming back in a new form?
South Africa's homicide rates have declined consistently since democracy, but remain among the highest in the world. They are about four times the global average at more than 30 per 100,000 people.