Revolution: Wael Ghonim, Paul Mason and Mary King

On Start the Week Andrew Marr talks revolution. Wael Ghonim explains how social networks played a vital role in the Arab Spring. His Facebook page,'We Are All Khaled Said', which featured the death of a young Egyptian, inspired a new generation to fight oppression. Mary King, Professor of Peace and Conflict Studies looks back to earlier struggles in eastern Europe, and the journalist Paul Mason explores how far the worldwide economic crisis and growing inequality lie behind the new revolutions. Producer: Katy Hickman.