In the context of ever-increasing humanitarian needs worldwide, anticipatory action is being recognised as one of main the ways in which predictable shocks can be prevented from turning into crises, reducing both the impacts and the costs. Anticipatory action is a critical approach, bridging the work of disaster risk reduction and humanitarian response, and showing great promise as a modality for nexus programming (for example, linking humanitarian to development). While a scale-up of anticipatory action is much needed, it also requires a truly decolonial and feminist approach that supports communities to uphold their rights., To meet this vision, Oxfam has laid out four interconnected fundamental principles for all partners and stakeholders involved in scaling up anticipatory action to use: Feminist and intersectional anticipatory action that is systematic in recognising the strengths and vulnerabilities of people in at-risk communities. It integrates vulnerability indicators to build anticipatory action systems which include at a minimum gender-sensitive, gender-inclusive, and gender-transformative approaches. Decolonial and locally led anticipatory action that challenges global-local power dynamics, recognises and places local leadership as the primary holder of knowledge and decision-making, and ensures funding is accessible for the local and national civil society organisations and communities at the frontlines of disasters. Holistic anticipatory action that does not operate in isolation, that recognises the holistic nature of the system, and responds to the complexity of risks and hazards and the interconnectedness of anticipatory action across disaster management cycles. Collaborative anticipatory action that prioritises common objectives, optimises resources, ensures alignment between efforts, and provides complementarity across the humanitarian, climate, and development sectors., Adopting these principles in the scale-up of anticipatory action will unlock some of the key challenges of the approach. The principles acknowledge the sectoral trends that call for sector-wide transformation in line with key principles, but overall, they are designed to ensure that anticipatory action is effective and fit for purpose. This paper calls for governments, communities, humanitarian, climate, peace and development practitioners, and the private sector to adopt the proposed four interconnected fundamentals in the scale-up of anticipatory action and support at-risk communities to uphold their rights. This principled approach to embedding anticipatory action into policy, practice, and legal frameworks is required to maximise the potential of anticipatory action and prevent predictable shocks from becoming crises.