5 facts about how the world’s population is expected to change by 2100
The world’s population is expected to peak at 10.3 billion in 2084 and then decline to 10.2 billion through the end of the century.
Numbers, Facts and Trends Shaping Your World
Multiple Regions / Worldwide
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People in Many Countries Consider the U.S. an Important Ally; Others See It as a Top Threat
People in 12 of 24 nations surveyed tend to say the U.S. is their top ally. But it’s also widely seen as a top threat, as are Russia and China.
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Dissatisfaction with democracy remains widespread in many nations
Across 12 high-income countries, a median of 64% of adults say they are dissatisfied with the way their democracy is working, while a median of 35% are satisfied.
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Globally, 1 in 10 adults under 55 have left their childhood religion
The share of people who retain their childhood religious identity in adulthood varies across religious categories.
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NATO Viewed Favorably Across 13 Member Nations
Ahead of the June 2025 NATO summit, international views of Putin and Russia remain negative, while Zelenskyy gets mixed ratings overall.
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How people in the U.S. and other G7 countries view each other
Americans have more favorable views of the other G7 countries than people in these countries do of the U.S.
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U.S. Image Declines in Many Nations Amid Low Confidence in Trump
More than half of adults in 19 of 24 countries surveyed lack confidence in Trump’s leadership on the world stage.
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Islam was the world’s fastest-growing religion from 2010 to 2020
From 2010 to 2020, the number of Muslims increased by 347 million people to 2.0 billion people.
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How the Global Religious Landscape Changed From 2010 to 2020
Christians remain the largest religious group, and Muslims grew the fastest from 2010 to 2020. Read how the global share of Buddhists, Hindus, Jews and the religiously unaffiliated changed.
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Religious Composition by Country, 2010-2020
Find how many people identify with each religious group and what percent each made up in 201 countries and territories, and by region, in 2010 and 2020.
