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: 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.