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Blessed Be The BelieverIn God We Trust |
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| Major Religious Groups | |||
|---|---|---|---|
| Religion in the United States | Religion in Canada | Religion in Mexico | Religion in Africa |
| Religion in Asia | Religion in Australia | Religion in Europe | Religion in South America |
In the 20th century study of comparative religion, major religious groups or "world religions" were divided up by adherence to a specific philosophy or theology. However, there is no consensus among researchers as to the best methodology for determining the religiosity profile of the world's population. A number of fundamental aspects are unresolved:
Nonetheless, Christianity, Islam, Hinduism, and Buddhism are usually considered the respective top four.
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The table below lists religions classified by philosophy; however, religious philosophy is not always the determining factor in local practice. Please note that this table includes heterodox movements as adherents to their larger philosophical category, although this may be disputed by others within that category. For example, Cao Đài is listed because it claims to be a separate category from Buddhism, while Hoa Hao is not, even though they are similar new religious movements.
The population numbers below are computed by a combination of census reports, random surveys (in countries where religion data is not collected in census, for example USA or France), and self-reported attendance numbers, but results can vary widely depending on the way questions are phrased, the definitions of religion used and the bias of the agencies or organizations conducting the survey. Informal or unorganized religions are especially difficult to count. Some organizations may wildly inflate their numbers.
| Cultural tradition | Religious category | Number of followers | Date of origin | Main regions covered |
|---|---|---|---|---|
| Abrahamic religions | Christianity | 2.1 billion[6] | 1st century | Worldwide except Northwest Africa, the Arabian Peninsula, and parts of Central, East, and Southeast Asia. |
| Islam | 1.5 billion[6] | 7th c. | Middle East, Northern Africa, Central Asia, South Asia, Western Africa, Indian subcontinent, Malay Archipelago with large population centers existing in Eastern Africa, Balkan Peninsula, Russia, Europe and China. | |
| Judaism | 12–25 million[7] | 1300 BC | Israel and Jewish diaspora (meaning mostly North America and Europe) | |
| Bahá'í Faith | 5 million[8] | 19th c. | Dispersed worldwide with no major population centers | |
| Rastafari movement | 700 thousand[9] | 1930s | Jamaica, Caribbean, Africa | |
| Dharmic religions | Hinduism | 650 million –1.4 billion[10] | 2500–3000 BC or older | Indian subcontinent, Fiji, Guyana, Trinidad and Mauritius |
| Buddhism | 250–500 million[11] | c. 500 BC | Indian subcontinent, East Asia, Indochina, regions of Russia. | |
| Sikhism | 10–20 million[12] | 15th c. | Indian subcontinent, Australasia, Northern America, Southeast Asia, the United Kingdom and Western Europe. | |
| Jainism | 6–12 million[13] | c. 800 BC | India, and East Africa | |
| Far Eastern religions | Taoism | Varies[14] | Han Dynasty: 206 BC – 220 AD | China and the Chinese diaspora |
| Shinto | Varies | Varies by tradition | Japan | |
| Folk religions | ||||
| Chinese folk religions | Varies[14] | Varies by tradition | China | |
| African traditional and diasporic religions | Millions[14] | Varies by tradition | Africa, Americas | |
| Other folk religions | Millions[14] | Varies by tradition | India, Asia | |
| Other each over 500 thousand |
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| Chondogyo | 3 million[15] | 1812 | North Korea | |
| Tenrikyo | 2 million[16] | 1832 | Japan, Brazil | |
| Cao Đài | 1–3 million[17] | 1925 | Vietnam | |
| Ahl-e Haqq | 1 million[18] | 14th century | Iraq, Iran | |
| Seicho-No-Ie | 800 thousand[16] | 1929 | Japan | |
| Yazidism | 700 thousand[19] | 12th century or older | mainly Iraq | |
| Unitarian-Universalism | 630 thousand[20] | 1961 | United States, Europe |
Since the late 19th century the demographics of religion have changed a great deal. Some countries with a historically large Christian population have experienced a significant decline in the numbers of professed active Christians. Symptoms of the decline in active participation in Christian religious life include declining recruitment for the priesthood and monastic life, as well as diminishing attendance at church. At the same time, there has been an increase in the number of people who identify themselves as secular humanists. In many countries, such as the People's Republic of China, communist governments have discouraged religion, making it difficult to count the actual number of believers. However, after the collapse of communism in numerous countries of Eastern Europe and the former Soviet Union, religious life has been experiencing resurgence there, particularly in the forms of Neopaganism and Far Eastern religions.
Following is some available data based on the work of World Christian Database and its predecessor, the World Christian Encyclopedia. While controversial in some respects, the results have been studied and found "highly correlated with other sources of data" but "consistently gave a higher estimate for percent Christian in comparison to other cross-national data sets" according to a study published in the Journal for the Scientific Study of Religion.[21]
| 1970-1985[8] | 1990-2000[22][23] | 2000-2005[24] |
|---|---|---|
| 3.65% - Bahá'í Faith | 2.65% - Zoroastrianism | 1.84% - Islam |
| 2.74% - Islam | 2.28% - Bahá'í Faith | 1.70% - Bahá'í Faith |
| 2.34% - Hinduism | 2.13% - Islam | 1.62% - Sikhism |
| 1.67% - Buddhism | 1.87% - Sikhism | 1.57% - Hinduism |
| 1.64% - Christianity | 1.69% - Hinduism | 1.32% - Christianity |
| 1.09% - Judaism | 1.36% - Christianity | |
| 1.09% - Buddhism | ||
| The annual growth in the world population over the same period is 1.41%. |
A 2002 Pew Research Center study found that, generally, poorer nations had a larger proportion of citizens who found religion to be very important than richer nations, with the exception of the United States.[25]
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