Why the decline? One factor is the dramatic spread of democracy around the globe over the past half a century. Most people surveyed agreed that democracy is a good form of government, with no differences across religious faiths. One of the features of a democracy is the disentanglement of the sacred from the secular because in religiously pluralistic countries no one can legitimately claim special status by faith membership. Democracies also have higher literacy rates and mass education that lead to a tolerance for the beliefs of others that, in turn, lowers the absolutism most religions in the past required, thus undermining the truth claims of any one religion over others.

A second factor is the opening up of economic borders, such as between member nations of the European Union, which replaces zero-sum religious tribalism with nonzero financial exchange. Free trade and the division of labor constitute the greatest generator of wealth in history, and according to the Religion Monitor report using the survey data, “socio-economic well-being generally results in a decline in the social significance of religion in society and a decrease in the numbers of people who base their life praxis on religious norms and rules.” Why? One of the social functions of religion is to help the poor, so as a country’s impoverished declines (and, as in Sweden and other European countries, government social programs aid the poor), so, too, does religiosity. And because the middle classes of most countries are growing from the youth up, that could explain the report’s assessment that “almost all the countries in the study … exhibit a decline in the centrality and significance of religion for daily life from one generation to another. As a general rule, the younger people are, the lower their religiosity.”