Humanitarian and social justice efforts in Africa confront a complex web of deeply interconnected challenges: child marriage, educational inequality, sexual and gender-based violence (SGBV), violence against women and girls (VAWG), Queer rights, land rights, and the rights of Persons with Disabilities (PWD). These issues do not exist in isolation, they are mutually reinforcing systems of oppression that demand a holistic, integrated response. This paper argues that the traditional silo approach to addressing these challenges is fundamentally inadequate. Drawing on intersectionality theory and Human Rights-Based Approaches (HRBA), and grounding analysis in country case studies from Nigeria, Ghana, Togo, Benin Republic, South Africa, Uganda, and the Democratic Republic of Congo, the paper presents a cross-movement advocacy framework for addressing multiple social justice issues concurrently. The paper advances strategic recommendations across five domains: policy and legal reform, programmatic integration, community-led approaches, equitable resource allocation, and disaggregated data generation. It argues that genuinely transformative advocacy praxis in Africa requires recognizing the indivisible nature of human rights, centering community agency, and fundamentally restructuring funding paradigms toward flexible, long-term support for African civil society.