Strands run through the format of the festival weekend, allowing in depth examination of a subject. Select a strand below to find out more.
Public inquiries in the dock
"The 2012 Battle of Ideas at the Barbican was the best ever. It was bustling with interesting people, punchy debates and new ideas. I can't wait for 2013's."
Philippe Legrain, adviser to José Manuel Barroso, President of the European Commission