Why has Libya fallen apart since 2011? The world has largely given up trying to understand how the revolution that toppled Muammar Gaddafi has left the country a failed state and a major security headache for Europe. Gaddafi's police state has been replaced by yet another dictatorship, amidst a complex conflict of myriad armed groups, Islamists, tribes, towns and secularists. What happened? One of few foreign journalists to have lived in post-revolution...