Forced migration is increasingly recognised as a protracted condition rather than a short-term humanitarian crisis, thereby prompting urgent concerns regarding social sustainability within host communities. This conceptual, literature-driven study investigates the ways in which livelihood insecurity, reflected in precarious employment, fluctuating income, legal restrictions, insecure housing, and inadequate access to essential services, influences social sustainability outcomes across forced migration settings. To address this issue, the paper proposes an integrated four-dimensional analytical framework encompassing economic, institutional, spatial, and social dimensions, through which the relationship between livelihood insecurity, social cohesion, intergenerational well-being, and human capital development is systematically examined. Particular emphasis is placed on women and children, who, although frequently categorised as vulnerable populations, remain fundamental to long-term integration processes and the strengthening of intergenerational resilience. By drawing upon interdisciplinary scholarship in forced migration, livelihoods, and human security, the analysis demonstrates how structural forms of insecurity erode social sustainability and disrupt durable integration pathways over time. The study contends that policy measures aimed at enhancing women’s livelihood opportunities and improving children’s access to education and social services should be understood not merely as humanitarian imperatives, but as strategic investments in achieving socially sustainable integration. Overall, the findings advance ongoing debates in human security and social sustainability by framing livelihood insecurity as a structural limitation that significantly shapes long-term social resilience in contexts of forced displacement.