Contributor(s): Dr Chaloka Beyani, Ignacio Llanos, Professor Sir Adam Roberts | The UN has a responsibility to protect populations from genocide and crimes against humanity, but to what effect? Experts will consider how recent events, such as those in Libya, challenge the international concept of 'Responsibility to Protect'. Chaloka Beyani is senior lecturer in law, LSE. Ignacio Llanos is counsellor of the Embassy of Chile in the UK. Adam Roberts is president of The British Academy.