Demographics of atheism

Atheism is a position regarding the existence of gods or deities. While it is often defined as a lack of belief in a god, the actual demographics are difficult to track accurately. Researchers struggle to define clear boundaries between atheism, agnosticism, and non-religious beliefs. Agnosticism is the view that the existence of a god is unknown or unknowable. Many people fall into the category of being "unaffiliated," which includes atheists, agnostics, and those with no religious identity. This group is highly diverse and does not follow a single organizational structure.

Measuring these populations involves complex methodological challenges. One major issue is that words like "atheism" or "God" do not always translate well between different languages and cultures. This makes cross-cultural comparisons very tenuous. Additionally, social stigma can lead to under-reporting. In some regions, people may face discrimination or persecution for their views. This might cause them to hide their true beliefs during surveys. Conversely, some governments promote atheism, which might lead to over-reporting.

There are also discrepancies in how people self-identify versus what they actually believe. A person might not believe in a deity but may not call themselves an "atheist." For example, in the United States, many people who do not believe in a god identify as "nothing in particular." In Norway, 41% of people claim they do not believe in a deity, yet only 10% call themselves atheists. In the Czech Republic, 48% claim no belief in a deity, but only 20% self-identify as atheists. This shows that self-identification is not always the same as a lack of belief.

History shows that atheist philosophy has existed for many millennia. The first recorded instances of atheistic schools are found in ancient Indian thought. These ideas existed during the times of ancient Hinduism. In the West, atheism has roots in pre-Socratic Greek philosophy. However, it did not emerge as a distinct perspective on religious claims until the late Enlightenment. In Asia, nontheistic religions like Buddhism and Jainism have been significant for thousands of years. Other schools, such as the Carvaka in India, also played important roles in these cultures.

Global statistics show significant regional differences in atheism and non-religion. As of 2020, 78% of the global nonreligious or unaffiliated population lived in the Asia-Pacific region. China is a massive contributor to these numbers. The Chinese government promotes atheism, and China alone accounted for 200 million atheists and agnostics in 2013. China also makes up 67% of the global religiously unaffiliated demographic. In contrast, the prevalence of atheism in sub-Saharan Africa and South America typically falls below 10%.

Specific numbers regarding the global population vary by study and year. In 2006, sociologist Phil Zuckerman estimated there were 500 to 750 million people without a belief in a deity. By 2013, researchers Ariela Keysar and Juhem Navarro-Rivera estimated there were 450 to 500 million positive atheists and agnostics. This represented about 7% of the world's population. Some studies suggest global atheism might be declining. This is because irreligious countries often have the lowest birth rates, while religious countries tend to have higher birth rates.

Some countries have very high concentrations of atheists and agnostics relative to their size. Sweden has a possible range of 46% to 85%. Vietnam follows with 81%. Denmark ranges from 43% to 80%. Norway sits between 31% and 72%. Japan has a range of 64% to 65%. Despite these high numbers, many atheists still engage with spiritual concepts. In the Netherlands, 41.1% of "convinced atheists" say they believe in telepathy. Another 21.1% believe in reincarnation. This demonstrates that atheism is not always the opposite of spirituality.