This essay analyses the gap between the theoretical and practical application of the theory of change, with a focus on the United Nations. The purpose of the theory of change is to implement changes in policies and procedures, and the role of key concepts is to communicate the changes with stakeholders. The assumptions of the theory of change can help in strategic planning and monitoring and evaluation. The evidence suggests that the application of the theory of change can be challenging due to the selling of the change required. The social science activity is required for contextualising and understanding the evidence-based module. The best practice for the theory of change is to provide value and describe the effectiveness of the change. The essay falls under the subject of Development Studies and does not mention any specific course code, course name, or college/university.