Video includes a prediction of muslim population growth, Christian population growth, hindu population growth, Buddhist population growth from 2020 to 2100.
The growth of religion is the spread of religions and the increase of religious adherents around the world. Statistics commonly measure the absolute number of adherents, the percentage of the absolute growth per year, and the growth of the number of converts in the world. Projections of future religious adherence depend on assumptions that trends, total fertility rates, life expectancy, political climates, conversion rates, secularization, etc will continue. Such forecasts cannot be validated empirically and remain contentious, but are useful for comparisons.
Christianity has been the world's largest religion for millennia but its reign might come to an end sometime during the current century, overtaken by Islam. Muslims are the world's largest growing religious group, according to Pew Research, increasing twice as fast as the world population. While the world's population will likely increase by 32% in the ensuing decades, the number of Muslims will possibly grow by 70%, rising from 1.8 billion in 2015 to around 3 billion in 2060. Pew Research also estimates that the percentage of religiously unaffiliated people is expected to decline from the current 16% to about 13%
Among other religions, the percentage of Buddhists is expected to decline in the future, reduced by 7%, from 500 million in 2015 to 462 million in 2060. Low fertility rates in countries like China, Thailand, and Japan are responsible for that trend. Interestingly, the adherents of folk religions, which include African traditional religions, Chinese folk religions as well as Native American and Australian Aboriginal religions are likely to rise by 5%, from 418 million worldwide to 441 million.
Studies in the 21st century suggest that, in terms of percentage and worldwide spread, Islam is the fastest-growing major religion in the world. A religious forecast for 2050 by Pew Research Center concludes that the global Muslim population is expected to grow at a faster rate than the Christian population due primarily to the young age and high fertility rate of Muslims
Statistics on religious adherence are difficult to gather and often contradictory; statistics for the change of religious adherence are even more so, requiring multiple surveys separated by many years using the same data-gathering rules.
Source: The World Religion Dataset
Source: Pew research
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