As global humanitarian funding declines and nationalist agendas gain prominence, internally displaced populations (IDPs) face growing health and social risks. Using Mozambique as a central case, this eighth paper in our series on ‘Internal Displacement in a Changing World Order’ examines how shifting political and financial dynamics are reshaping the social determinants of health for IDPs in contexts of recurrent displacement. In Mozambique, where conflict, climate-related hazards, and structural poverty make displacement predictable rather than exceptional, humanitarian assistance has been critical in saving lives but remains predominantly short-term and crisis-driven, failing to address the structural drivers of displacement, leaving many exposed to cumulative health and social vulnerability once emergency responses subside. The paper argues for a transition toward resilient, nationally led systems that integrate IDPs into inclusive health, social protection, and climate adaptation agendas, reframing displacement as a core health equity and development challenge rather than a temporary humanitarian concern.