This year’s survey works from a baseline of 1900 A.D., and makes projections out to 2050. Within that century and a half there’s some good news about the global human condition that ought to be kept in mind when remembering the bad news of the 20th century and the early 21st. For example: in 1900, 27.6 percent of adults in a world population of 1.6 billion were literate. In 2015, 81 percent of the adults in a global population of 7.3 billion are literate, and the projection is that, by 2050, 88 percent of the adults in a world of 9.5 billion people will be literate””a remarkable accomplishment.
Of the 7.3 billion human beings on Planet Earth today, 89 percent are religious believers, while 1.8 percent are professed atheists and another 9 percent are agnostics: which suggests that Chief Poobah of the New Atheists Richard Dawkins and his friends are not exactly winning the day, although their “market share” is up from 1900.
There were some 267 million Catholics in the world in 1900; today, the world Church counts 1.2 billion members, with a projected growth to 1.6 billion by the middle of the century. Yet in the last quarter of the 20th century Catholicism was displaced by Islam as the world’s largest religious community, as the global Muslim population grew from 571 million in 1970 to today’s 1.7 billion.