The papers included in this volume comprise research from participants in the 2018 Nuclear Scholars Initiative and the Project on Nuclear Issues (PONI) Conference Series. PONI sponsors this research to provide a forum for facilitating new and innovative thinking and to provide a platform for emerging thought leaders across the nuclear enterprise. The papers in this volume span a wide range of technical and policy issues, further discussion in their respective areas, and provide innovative recommendations for pressing challenges. To that end, these papers explore such topics as the impacts of emerging technologies and capabilities, deep-diving on nuclear strategy and national policies, proposing paths forward for addressing proliferation challenges, and enhancing arms control in contentious environments.