Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
Arguments regarding the existence of an American cultural divide are frequently placed in a religious context. This paper seeks to establish that, all politics aside, the American religious divide is real, that religious polarization is not a uniquely American phenomenon, and that religious divides can be understood as naturally emergent within the club theory of religion. Analysis of the survey data reveals a bimodal distribution of religious commitment in the U.S. International data reveals evidence of bimodal distributions in all twenty-nine surveyed countries. The club theory of religion, applied in an agent-based computational model, generates bimodal distributions of member commitment.