Module 4 increased my understanding of health systems by placing the subtlety of policy-making firmly at the center, and emphasizing the central role played by research in facilitating good, evidence-based decision. I learned that health policy is at the very center of the structure and operation of any healthcare system, yet is often influenced by political forces, history, and social inequalities. The module highlighted that even robust policies can fail implementation unless they are backed by support systems, monitoring, and sensitivity to crisis events. Having already learned from previous modules, I was able to understand how this content integrates with what I learned about health systems as dynamic and interdependent organization in Module 1, and in Module 2, where a focus on communication and performance made me understand how policies must be communicated and interpreted clearly in order to be effective. From Module 3, I learned data quality and health informatics that directly relates to policy evaluation and improvement. Module 4 further built my research skills through learning how to craft a problem statement as well as come up with a concept note, further instilling the idea of "good research informs good policy." Overall, this module blended historical awareness, analytical thinking, and research literacy, reminding me that policy-making is technical but very human.