"...[D]iplomatic sanctions are seen as a low-cost means of isolating and delegitimizing regimes. This perspective, however, fails to recognize that maintaining diplomatic sanctions may actually entail a number of substantial costs to the United States and may even undermine economic sanctions' effectiveness."

"Diplomatic sanctions...entail a number of often overlooked consequences for the United States. The potential costs of diplomatic sanctions include not only a substantial loss of information and intelligence on the target state, but also a reduction in communication capacity and a diminished ability to influence the target state. Ironically, diplomatic sanctions may even undermine the effectiveness of other coercive policy tools, such as economic sanctions. These adverse effects ought to cause policymakers to reassess the value of diplomatic isolation as a tool of foreign policy and recognize the inherent value of diplomatic engagement."