National Geographic - The World's Newest Major Religion: No Religion < 5min

The religiously unaffiliated, called "nones," are growing significantly. They’re the second largest religious group in North America and most of Europe. In the United States, nones make up almost a quarter of the population. In the past decade, U.S. nones have overtaken Catholics, mainline protestants, and all followers of non-Christian faiths. ... A lack of religious affiliation has profound effects on how people think about death, how they teach their kids, and even how they vote. ... There have long been predictions that religion would fade from relevancy as the world modernizes, but all the recent surveys are finding that it’s happening startlingly fast. France will have a majority secular population soon. So will the Netherlands and New Zealand. The United Kingdom and Australia will soon lose Christian majorities. Religion is rapidly becoming less important than it’s ever been, even to people who live in countries where faith has affected everything from rulers to borders to architecture. ... But nones aren’t inheriting the Earth just yet. In many parts of the world—sub-Saharan Africa in particular—religion is growing so fast that nones’ share of the global population will actually shrink in 25 years as the world turns into what one researcher has described as “the secularizing West and the rapidly growing rest.” (The other highly secular part of the world is China, where the Cultural Revolution tamped down religion for decades, while in some former Communist countries, religion is on the increase.)