Responsibility to protect (R2P) is a norm that states must protect their populations from mass atrocities and the international community has a responsibility to assist states or intervene through coercive measures if needed. R2P was developed following the Rwandan genocide in 1994 and calls for intervention in cases of genocide, war crimes, ethnic cleansing and crimes against humanity. However, implementing R2P can be problematic, as seen with the vetoes from Russia and China regarding intervention in Syria despite the ongoing civil war and crimes against humanity.