Philip Dodd examines A Crisis of Brilliance a new exhibition at London's Dulwich Picture gallery with the curator David Boyd-Haycock. As Turkey's anti-government protest continues, Elif Shafak, Karl Sharro and Professor Benjamin Fortna, explore the underlying reasons for civil society's dissatisfactions. Sarah Dillon is one of this year's New Generation Thinkers and her column is on the role of analogy in science. Søren Kierkegaard, the grandfather of existentialism, was also a sophisticated humourist. Philip is joined by theologian George Pattison and the Danish comedian Claus Damgaard for a Kierkegaardian lesson in freedom.