Irreligion is the absence or rejection of religious beliefs or practices. It encompasses a wide range of viewpoints drawn from various philosophical and intellectual perspectives, including atheism, agnosticism, skepticism, rationalism, and secularism. These perspectives can vary, with individuals who identify as irreligious holding a diverse array of specific beliefs about religion or its role in their lives.
State atheism or atheist state is the incorporation of hard atheism or non-theism into political regimes. It is considered the opposite of theocracy and may also refer to large-scale secularization attempts by governments. To some extent, it is a religion-state relationship that is usually ideologically linked to irreligion and the promotion of irreligion or atheism. State atheism may refer to a government's promotion of anti-clericalism, which opposes religious institutional power and influence in all aspects of public and political life, including the involvement of religion in the everyday life of the citizen. In some instances, religious symbols and public practices that were once held by religions were replaced with secularized versions of them. State atheism in these cases is considered as not being politically neutral toward religion, and therefore it is often considered non-secular.
British society is primarily irreligious. The nation is one of the most secularised in the world surveys determining religious beliefs of the population find that agnosticism, nontheism, atheism, secular humanism, and non-affiliation are views shared by a majority of Britons. Historically, it was dominated for over 1,400 years by various forms of Christianity, which replaced preceding Romano-British religions, including Celtic and Anglo-Saxon paganism. Religious affiliations of United Kingdom citizens are recorded by regular surveys, the four major ones being the national decennial census, the Labour Force Survey, the British Social Attitudes survey and the European Social Survey.
Irreligion is common throughout all provinces and territories of Canada. Irreligious Canadians include atheists, agnostics, and secular humanists. The surveys may also include those who are deists, spiritual, pantheists. The 2021 Canadian census reported that 34.6% of Canadians declare no religious affiliation, which is up from 23.9% in the 2011 Canadian census and 16.5% in the 2001 Canadian census. According to Ontario Consultants on Religious Tolerance, among those estimated 4.9 million Canadians of no religion, an estimated 1.9 million would specify atheist, 1.8 million would specify agnostic, and 1.2 million humanist.
Religion in Australia is diverse. In the 2021 national census, 43.9% of Australians identified with Christianity and 38.9% declared "no religion".
Religion has been a major influence on the societies, cultures, traditions, philosophies, artistic expressions and laws within present-day Europe. The largest religion in Europe is Christianity. However, irreligion and practical secularisation are also prominent in some countries. In Southeastern Europe, three countries have Muslim majorities, with Christianity being the second-largest religion in those countries. Ancient European religions included veneration for deities such as Zeus. Modern revival movements of these religions include Heathenism, Rodnovery, Romuva, Druidry, Wicca, and others. Smaller religions include Indian religions, Judaism, and some East Asian religions, which are found in their largest groups in Britain, France, and Kalmykia.
Some movements or sects within traditionally monotheistic or polytheistic religions recognize that it is possible to practice religious faith, spirituality and adherence to tenets without a belief in deities. People with what would be considered religious or spiritual belief in a supernatural controlling power are defined by some as adherents to a religion; the argument that atheism is a religion has been described as a contradiction in terms.
Accurate demographics of atheism are difficult to obtain since conceptions of atheism vary considerably across different cultures and languages, ranging from an active concept to being unimportant or not developed. Also in some countries and regions atheism carries a strong stigma, making it harder to count atheists in these countries. In global studies, the number of people without a religion is usually higher than the number of people without a belief in a deity and the number of people who agree with statements on lacking a belief in a deity is usually higher than the number of people who self-identify as "atheists".
Religion in New Zealand encompasses a wide range of groups and beliefs. New Zealand has no state religion and freedom of religion has been protected since the signing of the Treaty of Waitangi.
The predominant religion in the Republic of Ireland is Christianity, with the largest denomination being the Catholic Church. The Constitution of Ireland says that the state may not endorse any particular religion and guarantees freedom of religion.
In the United States, between 6% and 15% of citizens demonstrated nonreligious attitudes and naturalistic worldviews, namely atheists or agnostics. The number of self-identified atheists and agnostics was around 4% each, while many persons formally affiliated with a religion are likewise non-believing.
Estonia, historically a Lutheran Christian nation, is today one of the least religious countries in the world in terms of declared attitudes, with only 14 percent of the population declaring religion to be an important part of their daily life. This is thought to largely be a result of the Soviet occupation of Estonia in 1940, prior to which Estonia had a large Christian majority.
Irreligion in New Zealand refers to atheism, agnosticism, deism, religious scepticism and secular humanism in New Zealand society. Post-war New Zealand has become a highly secular country, meaning that religion does not play a major role in the lives of many of the population.
The main religion traditionally practiced in Latvia is Christianity. As of 2019, it is the largest religion (68.84%), though only about 7% of the population attends religious services regularly.
Irreligion is prevalent in Germany. In a time of near-universal adoption of Christianity, Germany was an intellectual centre for European freethought and humanist thinking, whose ideas spread across Europe and the world in the Age of Enlightenment. Later, religious traditions in Germany were weakened by the twin onslaughts of Nazi rule during World War II and that of the Socialist Unity Party in East Germany during the Cold War. In common with most other European societies, a period of secularisation also continued in the decades that followed. While today Christianity remains prevalent in the north, south, and west of Germany, in the east relatively few Germans identify with any religion whatsoever.
Irreligion in Ireland pertains to the population of Ireland that are atheist, agnostic, or otherwise unaffiliated with any religion. The 2022 census recorded that 14% of the population was irreligious; the second largest category after Roman Catholicism. The population was traditionally devoutly Catholic throughout much of Ireland's modern history, with a peak of 94.9% identifying as Catholic in the 1961 census. This percentage has declined to 69% in the 2022 census, the lowest recorded. Conversely, those with no religion made up less than 0.1% of the population in 1961; the proportion grew slowly until the 1991 census where it began to rapidly increase to its current share of 14% of the population in 2022.
Irreligion in Azerbaijan is open to interpretation according to differing censuses and polls. Although Shia Islam is the predominant faith in Azerbaijan, religious affiliation is nominal in Azerbaijan and percentages for actual practicing adherents are much lower. It is difficult to quantify the number of atheists or agnostics in Azerbaijan as they are not officially counted in the census of the country.
In the Philippines, atheists and agnostics are not officially counted in the census of the country, although the Philippine Statistics Authority in 2020 reported that 43,931 Filipinos have no religious affiliation or have answered "none". Since 2011, the non-religious increasingly organized themselves, especially among the youth in the country. There is a stigma attached to being an atheist in the Philippines, and this necessitates many Filipino atheists to communicate with each other via the Internet, for example via the Philippine Atheism, Agnosticism and Secularism, Inc. formerly known as Philippine Atheists and Agnostics Society.
Irreligion in Romania is rare. Romania is one of the most religious countries in Europe, with 92% of people saying that they believe in God. Levels of Irreligion are much lower than in most other European countries and are among the lowest in the world. At the 2011 census, only 0.11% of the population declared itself atheist, up from the 2002 census, while 0.10% do not belong to any religion. While still one of the most religious countries in Europe, practicing, church and mass attendance is quite low, even compared to some less religious countries than Romania. It is mainly practiced by elderly people, mainly in rural areas, while in urban areas church attendance and practice is much lower. As of 2021, almost 85% are declared religious, of which about 73% are declared orthodox, 12% other religions, about 1% atheists or irreligious and about 14% declared nothing about religion.
The decline of Christianity in the Western world is the decreasing Christian affiliation in the Western world. While most countries in the Western world were historically almost exclusively Christian, the post-World War II era has seen developed countries with modern, secular educational facilities shifting towards post-Christian, secular, globalized, multicultural and multifaith societies.
