This chapter outlines the architecture of the Women, Peace, and Security agenda at the United Nations. Building on the explanation of the adoption of UN Security Council Resolution 1325 provided earlier in the volume, it explores the meanings of “women,” “peace,” and “security” that are constructed through the WPS policy framework. The chapter traces the continuities and changes to the central concepts in the resolutions and reflects on the implications of these representational practices as they affect the provisions and principles of the WPS agenda in practice. Moreover, the chapter draws out the key provisions of each resolution to explore the tensions that have arisen over time regarding the types of energy and commitment that have become manifest in the architecture supporting WPS implementation. This in turn enables a brief analysis of likely future directions of WPS practice and a comment on the ways in which Security Council dynamics might affect and effect certain possibilities while excluding or proscribing others.