June 28 1914 - a young Bosnian on a street corner in Sarajevo fired a shot that triggered World War One. Why is this region so unstable, and what lessons can we learn from that event. Misha Glenny was a famous reporter during the wars of the 1990s, well-placed to find answers in a region he's travelled for years. Is the violence the fault of the people who live here, or are there bigger, outside forces at work?

This is the latest from the team behind The Invention of ... series which has recently been to China, Russia, Turkey and Hungary. Much of it is recorded on location, and contributors include Vesna Goldsworthy, Maria Todorova and Tim Butcher, author of The Trigger: Hunting the Assassin Who Bought the World to War.

Misha Glenny is the outgoing rector of the IWM in Vienna and presenter of In Our Time. His reporting from Yugoslavia won a Sony Gold in 1993.

The producer for BBC Studios is Miles Warde. This is series eighteen and other contributors include Hannah Lucinda-Smith, Ivan Krastev, James Heneage, Lea Ypi, Faruk Sehic and Dubravka Stojanovic. Locations include Sarajevo, Belgrade and Thessaloniki in northern Greece and the team occasionally pause for lunch.