Yes, says author Parag Khanna. Dictators like Gaddafi in Libya have the capability of doing create harm and, in the right circumstances, they should be killed. Society is better without them. No, says Juan E. Mendez, former president of the Inter-American Commission of Human Rights. It is immoral for countries to work outside the law. Acts such as torture and assassination are not justified even in the context dictatorships and terrorist attacks.