Irreligion is the active rejection of religion in general, or any of its more specific organized forms, as distinct from absence of religion. The Oxford English dictionary defines it as want of religion; hostility to or disregard of religious principles; irreligious conduct. Irreligion takes many forms, ranging from the casual and unaware to full-fledged philosophies such as atheism and agnosticism, secular humanism and antitheism. Social scientists tend to define irreligion as a purely naturalist worldview that excludes a belief in anything supernatural. The broadest and loosest definition, serving as an upper limit, is the lack of religious identification, though many non-identifiers express metaphysical and even religious beliefs. The narrowest and strictest is subscribing to positive atheism.
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.
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".
Atheism, agnosticism, scepticism, freethought, secular humanism or general irreligion are increasing in Australia. Post-war Australia has become a highly secularised country. Religion does not play a major role in the lives of much of the population.
In the United States, between 8% and 15% of citizens polled in 2019 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.
Irreligion in the Czech Republic pertains to atheism, agnosticism, and lack of religious affiliation in the Czech Republic. The history of irreligion in the Czech Republic dates back to 19th century freethought and saw additional developments during Communist rule. A majority of people in the Czech Republic are irreligious or otherwise unaffiliated, and the country is considered to be one of the most irreligious in the world.
Irreligion in Estonia pertains to atheism, agnosticism, and secularism of the people and institutions of Estonia. Irreligion is prominent in Estonia, where a majority of citizens are unaffiliated with any religion. Estonian irreligion dates back to the 19th century, when Estonian nationalists and intellectuals deemed Christianity a foreign religion in opposition to Estonian independence. Irreligion in Estonia was later accelerated by the Soviet occupation of the Baltic states, in which state atheism was enforced. By some metrics, Estonia is the most irreligious country in the world.
Irreligion in the Netherlands pertains to atheism, agnosticism, and other forms of irreligion in the Netherlands. Irreligion is the majority religious position in the country, and the Netherlands is one of the most irreligious countries in the world.
Irreligion in Ireland pertains to the population of Ireland that are atheist, agnostic, or otherwise unaffiliated with any religion. The 2016 census recorded that 9.8% of the population was irreligious; the second largest category after Roman Catholicism.
Irreligion in Egypt is controversial due to the largely conservative nature of the country and the religious establishments in the country. It is difficult to quantify the number of atheists or agnostics in Egypt, as the stigma attached to being one makes it hard for irreligious Egyptians to publicly profess their views and beliefs.
Irreligion in Spain is a phenomenon that has existed since at least the 17th century. Secularism became relatively popular in the late 19th and early 20th centuries, often associated with anti-clericalism and progressive, republican, anarchist or socialist movements.
Irreligion in Bulgaria pertains to atheism, agnosticism, and secularism among the citizens of Bulgaria. Irreligion is a minority religious position in Bulgaria. Making up approximately 5-10% of Bulgarians, irreligion is the third most common religious stance after Eastern Orthodoxy and Islam. Irreligion in Bulgaria is closely tied to the history of Marxism–Leninism and Soviet rule in the country during the 20th century.
Irreligion in Africa, encompassing also atheism in Africa as well as agnosticism, secular humanism and general secularism, has been estimated at over tens of millions in various polls. While the predominant religions in Africa are Islam and Christianity, many groups and individuals still practice their traditional beliefs. Despite this the irreligious population is notable, especially in South Africa where 15.1% of the population describe themselves as irreligious and in Botswana, where 20% of the population describes themselves as non-religious.
Irreligion in Latin America refers to various types of irreligion, including atheism, agnosticism, deism, secular humanism, secularism and non-religious. According to a global survey conducted in 2011, 16% of the population has no religion.
Irreligion in Italy includes all citizens of Italy that are atheist, agnostic, or otherwise irreligious. Approximately 12% of Italians are irreligious, and no affiliation is the second most common religious demographic in Italy after Christianity. Freedom of religion in Italy was guaranteed by the Constitution of Italy following its enactment in 1948. Until then, the Catholic Church was the official state church of Italy.
Irreligion in Montenegro refers in its narrowest sense to agnosticism, atheism, secular humanism, and general secularism. Increase of the number of irreligious people is usually interpreted by the modernization marked with tendency of secularization and the progress of science and technology that directly affect human society.
Irreligion in Latvia pertains to atheism, agnosticism, and lack of religious affiliation in Latvia. Irreligious thought in Latvian history is associated with national identity and a period of Communist rule. The irreligious make up a significant minority group in Latvia today, with 29% of Latvians identifying as irreligious.
Irreligion in Lithuania pertains to atheism, agnosticism, and lack of religious affiliation in Lithuania. Irreligious Lithuanians make up a small minority of the population, encompassing only 6.11% of the population in the Lithuanian census of 2021. Irreligion in Lithuania is associated with the period of Soviet rule in the late 20th century.
