The Global Delivery Initiative is a collaboration across the international development community to forge a new frontier in development efforts worldwide: improving the outcomes by leveraging the delivery know-how. The initiative's goal is to bring together the existing, but fragmented, knowledge of what works in international development; why and most importantly how to support practitioners in using these insights to deliver consistent results on the ground. By connecting perspectives, people and organizations across sectors and regions, the initiative supports the co-creation of an evidence base of delivery know-how: a science of delivery for development. Building on the wealth of experience of its partners, the initiative will unlock the potential of this cumulative delivery know-how. With ready access to these insights, practitioners everywhere can make better-informed decisions systematically, every time and in every country.