Scholars and governments are interested in four sets of questions concerning public opinion on foreign policy and national security policy. First, what do public opinion polls measure? How do citizens, who are generally uninformed about foreign policy and world affairs, form opinions on these matters? Second, how rational is public opinion? Is it stable or volatile? Are opinions coherent? Do opinions plausibly reflect the flow of world events? Third, what factors influence the formation of citizen opinions? Specifically, what is the impact of fundamental attitudes toward war and military force, partisanship, ideology, and gender? Finally, how universal are the determinants of citizen opinion, especially on crucial issues of war and peace? Are the findings in global comparisons the same as those in the American or European contexts? Considerable scholarship has been devoted to these four questions. Scholars now characterize public opinion as rational, in the sense that it is fairly stable, coherent, and responsive to real world events. Attitudes toward war and military force are a major focus of the research literature because many specific policy attitudes flow from fundamental views of war. Gender has also become a major focus of research because many studies find that women are less supportive of the use of military force for most purposes. Finally, scholars are beginning to discover that some opinion patterns are universal across societies, while others are more affected by the individual characteristics of national societies. Studies of global public opinion have expanded greatly, with recent scholarship focusing on global attitudes toward gender equality, immigration, and climate change.