Abstract copyright UK Data Service and data collection copyright owner.The research projected was a series of two surveys in the US, UK, and France (an extra post 2014 European election wave was added in the UK) investigating factors affecting public opinion about foreign policy by studying the dynamics of opinion about possible military and humanitarian aid interventions in Syria in three major democracies - the United Kingdom, the United States and France. The Syrian situation has great real-world urgency while presenting a significant opportunity to bolster understanding of how public opinion shapes and constrains the policies that elites can choose. The first surveys have a great focus on the Syrian crisis as well as included additional...