This question fuels a persisting debate at the heart of the sociology of religion. Does modernization lead to secularization? Any answer to this question demands explanation. If modernization causes religiosity to fade, then why? If not, then how are we to understand the seemingly common trend of religious influence diminishing in the wake of modernization? Over the past decades the theory of secularization has fallen to the wayside, but two political scientists, Ronald Inglehart and Christian Welzel, are amassing a prodigious body of data that brings the debate back to life. With the World Values Survey, they suggest that religion fades not necessarily as a country develops economically, but as a country becomes more existentially secure.