As the challenge of preventing military conflict has become increasingly complex in the post-Cold War era, economic sanctions are being applied with growing frequency. Sanctions are also being used to enforce international law, to deter aggression and terrorism, to defend democracy and human rights, and to prevent nuclear proliferation. This study addresses questions about the utility, appropriateness and success or failure of sanctions, as well as their impact on the poor and innocent. Specific case studies, focusing on recent conflicts such as those in Haiti, Iraq, South Africa and the former Yugoslavia, demonstrate the principal aspects of economic sanctions.