As climate diplomacy becomes an increasing necessity, more countries are working to integrate climate change into their foreign policy. They do this both to further international cooperation to combat and address the issue and to protect domestic interests in climate change decisions that have wide implications on economic development, national security and other matters. This paper presents a theory of change that depicts how the world’s poorest countries can increase the influence of their climate diplomacy. Join the debate to help us further develop our spheres of influence and interrogate our assumptions as we strive to contribute to best policy and practice in this field.