It is tendentious and dishonest to say simply that Gaddafi was ‘killing his own people’; he was killing those of his people who were rebelling. He was doing in this respect what every government in history has done when faced with a rebellion. We are all free to prefer the rebels to the government in any given case. But the relative merits of the two sides aren’t the issue in such situations: the issue is the right of a state to defend itself against violent subversion. That right, once taken for granted as the corollary of sovereignty, is now compromised. Theoretically, it is qualified by certain rules. But, as we have seen, the invocation of rules (e.g. no genocide) can go together with a cynical exaggeration and distortion of the facts by other states. There are in fact no reliable rules. A state may repress a revolt if the permanent veto-holding powers on the Security Council allow it to (e.g. Bahrain, but also Sri Lanka) and not otherwise.