"So far, most of the concerns raised in connection with the use of military force in Syria have focused on the risk that the U.S. might become further embroiled in this conflict, and that initially limited strikes could soon spiral out of control, lead to retaliatory attacks by the Asad regime, spread the conflict throughout the region, and inadvertently strengthen terrorist groups linked to al Qaeda. However, there is an additional, more immediate hazard, which has been largely absent from the debate....

"We need to recall that our original rationale for concern about Syria was humanitarian in nature, based on the suffering of millions of Syrian civilians who became refugees or internally displaced within their own country. The goal of providing medical assistance, shelter, and food to these innocent people is widely shared by the majority of the American people and their elected representatives in Congress. To that end, the U.S. Government has provided over one billion dollars in humanitarian assistance for this crisis, and has been quite successful in providing aid to millions of civilians, both within Syria and to Syrian refugees in surrounding countries. In contrast to our largely unsuccessful efforts to engineer a political transition, and to strengthen a disorganized and fragmented opposition which may or may not represent our interests, our humanitarian assistance has been our most effective and successful effort.

"Before we contemplate military strikes against the Syrian regime, we would do well to carefully consider what impact such strikes would have on our ongoing humanitarian programs, both those funded by the U.S. and by other countries and international organizations. These programs currently reach hundreds of thousands of vulnerable people throughout Syria, in areas controlled both by the regime and the opposition. We know from past military interventions, such as in Yugoslavia and Iraq, that airstrikes launched for humanitarian reasons often result in the unintended deaths of many civilians. The destruction of roads, bridges, and other infrastructure, which such airstrikes may entail, would significantly hamper the delivery of humanitarian aid in Syria.

"The provision of this assistance in regime controlled areas requires the agreement, and in many cases the cooperation, of the Asad government. Were the Asad regime, in response to U.S. military operations, to suspend this cooperation, and prohibit the UN and Nongovernmental Organizations from operating in territory under its control, hundreds of thousands of Syrian civilians would be denied access to food, shelter, and medical care. In such a scenario, we would be sacrificing programs of proven effectiveness in helping the people of Syria, in favor of ill considered actions that may or may not prevent the future use of chemical weapons, or otherwise contribute to U.S. objectives in any meaningful way."