In North America , Muslims and followers of “other religions” are the fastest-growing religious groups. In the United States, for example, the share of the population that belongs to other religions is projected to more than double – albeit from a very small base – rising from % to %. 9 Christians are projected to decline from 78% of the . population in 2010 to 66% in 2050, while the unaffiliated are expected to rise from 16% to 26%. And by the middle of the 21st century, the United States is likely to have more Muslims (% of the population) than people who identify with the Jewish faith (%). 10 In Latin America and the Caribbean , Christians will remain the largest religious group, making up 89% of the population in 2050, down slightly from 90% in 2010. Latin America’s religiously unaffiliated population is projected to grow both in absolute number and percentage terms, rising from about 45 million people (8%) in 2010 to 65 million (9%) in 2050. 11 Changing Religious Majorities Several countries are projected to have a different religious majority in 2050 than they did in 2010. The number of countries with Christian majorities is expected to decline from 159 to 151, as Christians are projected to drop below 50% of the population in Australia, Benin, Bosnia-Herzegovina, France, the Netherlands, New Zealand, the Republic of Macedonia and the United Kingdom.
4 Views of Muslims vary widely across European countries . A Pew Research Center survey conducted this spring in 10 nations found that in eastern and southern Europe, negative views prevailed. However, the majority of respondents in the UK, Germany, France, Sweden and the Netherlands gave Muslims a favorable rating. Views about Muslims are tied to ideology. While 47% of Germans on the political right give Muslims an unfavorable rating, just 17% on the left do so. The gap between left and right is also roughly 30 percentage points in Italy and Greece.
Population size fluctuates at differing rates in differing regions. Nonetheless, population growth is the long-standing trend on all inhabited continents, as well as in most individual states. During the 20th century, the global population saw its greatest increase in known history, rising from about billion in 1900 to over 6 billion in 2000. A number of factors contributed to this increase, including the lessening of the mortality rate in many countries by improved sanitation and medical advances , and a massive increase in agricultural productivity attributed to the Green Revolution .