Granting or withholding humanitarian access in the Syrian civil war has been politicized, used by different warring parties to advance their military strategies and political objectives. For the regime, withholding access and preventing aid from reaching rebel-held areas is a deliberate strategy to punish and weaken opposition groups and to prevent the creation of an alternative political order. Regulating and distributing basic public goods, from food to electricity, is also used to reward loyalty and further civilian dependency on the regime. At times, aid has even been diverted to support the Syrian army’s war efforts. For the Islamic State (IS), preventing humanitarian access in areas under its control follows a distinct, yet equally political logic: IS wants absolute control and absolute civilian dependency. In this context, humanitarian access is de facto “weaponized.”