The aim of the thesis was to discover the historical effectivity of humanitarian corridors through a comparative study of four different cases and to identify factors that influence this effectivity. The focus of this research lies on the delivery of aid, not the evacuation of civilians. The cases included the Aleppo aid corridors and Bab al-Hawa corridor in Syria, the Sudan-South Sudan corridor and the Afar corridor in Ethiopia.   Based on the elements of effectivity identified by OCHA, the effectivity of the four cases was analyzed. This was done through extensive secondary research using comparative research methods, finding that effectivity is influenced by a variety of different factors. These factors were identified and discussed, and are: 1.     Involvement of conflicting parties. 2.     Involvement of neutral third parties. 3.     Existence of support agreements and monitoring mechanisms. 4.     Adherence of conflicting parties to International Humanitarian Law. 5.     Strategic goals of relevant parties.  Lastly, an overall conclusion and recommendations for improving the effectivity of humanitarian corridors are provided.