This DIIS Report details new research showing significant losses in social cohesion in extremely vulnerable Sahelian and West African regions impacted by forced migration, insecurity, and climate change. It concludes that there is a general loss of social cohesion and that these losses have detrimental material and social effects. However, the evaluation of present social cohesion programming in the report reveals a lack of attention to the losses to social cohesiveness caused by climate change. Instead, emphasis is placed on regions impacted by violence, instability, and forced migration. Therefore, it’s conceivable that significant losses to social cohesion are being disregarded and ignored. The study offers an overview of contemporary methods to social cohesiveness, including connections to loss and harm, in order to enhance programming activities. The report offers key lessons and potential next steps for actors looking to engage with social cohesiveness in practice based on its analysis of current techniques and programming and its unique examination of losses to social cohesion on the ground.