Williamson and Yancey, both sociologists at the University of North Texas, conducted an empirical study of people who call themselves atheists. This is a considerably smaller group than the 5 percent of Americans who say they do not believe in God. Since there are too few professed atheists to pick up in normal probability surveys, the authors conducted an online survey of about 1,400 members of atheist organizations and face-to-face interviews with 50 atheists, half in the Bible Belt and half in an unidentified 'progressive Midwestern college town.' Most of the atheists were educated, older, white men from weakly religious backgrounds. What seems to have pushed them into an explicitly atheist identity is their opposition to the political activity of the Christian Right. The atheists instead proposed a social ethic made of equal parts science, rationalism, and progressive politics. The authors are undecided whether there are actually significantly more atheists now, or whether social media—and political provocation—have led more of them to publicly proclaim their position. A solid empirical study that will be the best basis for future research. Summing Up: Recommended. All academic levels/libraries.