The four essays in this forum consider the influence of J. David Singer’s initial views and analyses dating from the 1960s and 1970s on topics that continue to hold great importance today. Three essays consider the implications of these early works and decisions on the subsequent study of war, as well as their continuing wisdom (or not) in light of subsequent research. The fourth essay examines Singer’s policy prescriptions in light of subsequent decisions and choices. In some cases, the ideas continue to have resonance with contemporary conflict research and policy issues, but in other instances there are grounds for reevaluation and the adoption of new research and data collection strategies or policy perspectives.