"Combining more than 80 years of experience with its global reach, Gallup knows more about the attitudes and behaviors of employees, customers, students and citizens than any other organization in the world."
Conducted on behalf of the Chicago Council on Global Affairs, it measures the concerns of Americans regarding economic, political, and military engagement in foreign affairs.
The GSS has been conducted since 1972 by the National Opinion Research Center. It measures attitudes toward social and public policy issues, economic status, political events, work, and family life. Some questions are asked each year, and topical modules are administered on a rotating basis that focus on current topics such as gender equity, religious beliefs, and perception of work.
Figure 1. Source: Chapter 5 of How to Lie with Statistics by Darrell Huff