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A decline of Christian affiliation in the Western world has been observed in the decades since the end of World War II. 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.

While Christianity is currently the predominant religion in Latin America, Europe, Canada and the United States, the religion is declining in many of these areas, particularly in Western Europe, North America, Australia and New Zealand. A decline in Christianity among countries in Latin America's Southern Cone has also contributed to a rise in irreligion in Latin America.

In the West, since at least the mid-twentieth century there has been a gradual decline in adherence to established Christianity. In a process described as secularization, "unchurched spirituality" is gaining more prominence over organized religion.

Background

According to a 2012 Pew Research Center survey, Christianity will continue to be the world's largest religion throughout the next four decades. However, Christianity may experience the largest net losses in terms of religious conversion, according to expectations. Worldwide, religious conversions are projected to have a "modest impact on changes in the Christian population" between 2010 and 2050 and may negatively affect the growth of Christian population and its share of the world's populations "slightly". However, these forecasts lack reliable data on religious conversion in China, but according to media reports and expert assessments, it is possible that the rapid growth of Christianity in China may maintain, or even increase, the current numerical advantage of Christianity as the largest religion in the world. In the United States, there have been some conversions to Christianity among those who grew up non-religious, but they have not been in numbers that make up for those who were raised as Christians but became religiously unaffiliated later in their lives.

Scholars have proposed that Church institutions decline in power and prominence in most industrialized societies, except in cases in which religion serves some function in society beyond merely regulating the relationship between individuals and God. Developing countries in Latin America and Africa are not experiencing a decline, mostly because of religious conversion in those countries where the Church offers broad social support services. Together with the decline of Western Christians, increasing numbers of Christians in the global South will form a "new Christendom" in which the majority of the world's Christian population will be found in the South. According to various scholars and sources, Pentecostalism – a Protestant Christian movement – is the fastest growing religion in the world; this growth is primarily due to religious conversion.

The European Values Study found that in most European countries in 2008, the majority of young respondents identified themselves as Christians. Unlike Western Europe, in Central and Eastern European countries, the proportion of Christians has either been stable or it has increased in the post-communist era. A large majority (83%) of those who were raised as Christians in Western Europe still identify as such. The remainder mostly self-identify as religiously unaffiliated. Christianity is still the largest religion in Western Europe, where 71% of Western Europeans identified themselves as Christian, according to a 2018 study by the Pew Research Center.

A 2015 analysis of the European Values Study in the Handbook of Children and Youth Studies identified a "dramatic decline" in religious affiliation across Europe from 1981 to 2008; however, according to the same analysis, "the majority of young respondents in Europe claimed that they belonged to a Christian denomination".

In 2017, a report which was released by St. Mary's University, London, concluded that Christianity "as a norm" was gone for at least the foreseeable future. In at least 12 out of the 29 European countries which were surveyed by the researchers, based on a sample of 629 people, the majority of young adults reported that they were not religious. The data was obtained from two questions, one asking "Do you consider yourself as belonging to any particular religion or denomination?" to the full sample and the other one asking "Which one?" to the sample who replied with "Yes". The Pew Research Center criticized the methodology of the two-step approach: "Presumably, this is because some respondents who are relatively low in religious practice or belief would answer the first question by saying that they have no religion, while the same respondents would identify as Christian, Muslim, Jewish, etc., if presented with a list of religions and asked to choose among them. The impact of these differences in question wording and format may vary considerably from country to country".

In 2018, the Pope lamented the ongoing trend of re-purposing churches: some of them were being used as pizza joints, skating parks, strip clubs and bars. In Germany, 500 Catholic churches have closed since 2000. Canada has lost 20% of its churches in this time frame. This is the result of a lack of clergy who are willing to staff churches as well as the result of the churches' inability to meet costs. After a scandal in Naples where a deconsecrated church became the venue for a Halloween party which featured scantily clad witches who were seated on the former altar, Pope Francis, acknowledging the decline in Church attendance, implored that the deconsecrated churches be placed in service to fulfill the social needs of caring for the poor. In a new study published in 2022, Pew Research Center projects that if the rate of switching continues to accelerate (primarily to no religious affiliation), Christians will make up less than half of the American population by 2070, with estimated ranges for that year falling between 35% and 46% of the American population (down from 64% in 2022 and down from 91% in 1976). The same study found a retention rate among American Christians closer to 67%, with one-third of those who were Christian in childhood leaving the religion by age 30.

In the Western world, historical developments since the reformation era in the sixteenth century led to a gradual separation of church and state from the eighteenth century onward. From the mid-twentieth century, there has been a gradual decline in adherence to established Christianity. In a process described as secularization, "unchurched spirituality", which is characterized by observance of various spiritual concepts without adhering to any organized religion, is gaining more prominence.

Europe

According to Scholars, in 2017, Europe's population was 77.8% Christian (up from 74.9% 1970). These changes were largely the result of the collapse of Communism and switching to Christianity in the former Soviet Union and Eastern Bloc countries. According to the 2021 Eurobarometer survey, Christianity was the largest religion in the European Union, accounting 66.1% of the EU population, down from 72% in 2012.

In 2017, Pew Research Center have found that the number of Christians in Europe, is in decline. This is mainly because the number of deaths is estimated to exceed the number of births among European Christians, in addition to lower fertility and switching to no religious affiliation.

In 2018, Pew Research Center have found a retention rate among Western European Christians of around 83% (ranging from 57% in the Netherlands to 91% in Austria). Despite the decline in Christian affiliation in Western Europe, Christianity is still the largest religion in Western Europe, where 71% of Western Europeans identified themselves as Christian, according to a 2018 study by the Pew Research Center. Unlike Western Europe, in Central and Eastern European countries the proportion of Christians has been stable or even increased in the post-communist era.

In Western Europe, Christians have relatively low retention rates in the Netherlands (57%), Norway (62%), Belgium and Sweden (65%); the majority of those who have left Christianity in these countries now identify as religiously unaffiliated. Meanwhile, Christians have relatively high retention rates in Austria (91%), Switzerland and Italy (90%), and Ireland and the United Kingdom (89%). The proportion of respondents who currently identify as Christian has been in decline in Czechia and Slovakia; meanwhile, the proportion of respondents who currently identify as Christian has been stable or even increased in the rest of the Central and Eastern European countries.

Austria

In Austria, between 1971 and 2021 Christianity declined from 93.8% to 68.2% (Catholism from 87.4% to 55.2% and Protestantism from 6% to 3.8%) while people with no religion rose from 4.3% to 22.4%. Currently, Christianity is adhered to by 68.2% of the country's population, according to the 2021 national survey conducted by Statistics Austria. Among Christians, 80.9% were Catholics, 7.2% were Orthodox Christians (mostly belonging to the Eastern Orthodox Church), 5.6% were Protestants, while the remaining 6.2% were other Christians, belonging to other denominations of the religion or not affiliated with any denomination, and 22.4% declared they did not belong to any religion, denomination or religious community.

France

Christianity has been declining in France steadily since the 1980s. In 2021, a French poll showed that over half of French citizens do not believe in God or consider Christianity to be irrelevant. People who identified as Catholic declined from 81% in 1986 to 47% in 2020, while the number of people who identified as not religious rose from 16% to 40%. In 2021, around 50% of all French respondents identified as Christians.

Finland

In Finland, 77.4% of the population practiced Christianity, and the figure decreased to 67.7% in 2021, about a 10 digit decrease in a decade. The number of church members leaving the Church saw a particularly large increase during the fall of 2010. This was caused by statements regarding homosexuality and same-sex marriage – perceived to be intolerant towards LGBT people – made by a conservative bishop and a politician representing Christian Democrats in a TV debate on the subject.

Germany

In 2022, it was estimated that 50.7% of the German population were Christians, among them, 47.4% members of the two large Christian churches. Attendance and membership in both Catholic and Protestant churches in Germany have been declining for several decades. As of 2021, less than half of German citizens belong to a church for the first time in the country's history. Around 52.7% of the population were Christians, among them, 49.7% members of the two large Christian churches. Around 360,000 Catholics left the church in 2021 alone, and about 280,000 people have left Protestant churches. In 2017, Pew Research Center have found that the number of deaths is estimated to exceed the number of births among German Christians by nearly 1.4 million.

Hungary

According to some sources, Christianity is declining in Hungary. Between 1992 and 2022, Christianity declined from 92.9% to 42.5%(Catholicism from 67.8% to 29.2%). In 2022, only 35.5% of people with age group 30-39 identified as Christians, the number further dropping to 32.8% of people with age group 20-29. Among Catholics, only 12% regularly attend church. On the other hand, a series of surveys conducted by Pew Research Center in 2018 found that the share of Christians has remained fairly stable in Hungary (75% who say they were raised Christian versus 76% who say they are Christian now).

Ireland

Christianity, specifically Catholicism, remains the predominant religion in the Republic of Ireland. In the 2022 census, 75.7% of the population identified as Christian. However, recent social changes, including the lifting of a ban on abortion and the legalizing of same sex marriage, have solidified the growth of liberal thinking in Ireland, particularly within the younger community. An Irish priest, Fr. Kevin Hegarty, asserted in 2018 that the church's authority was undermined by the papal encyclical, called Humanae Vitae, that established the Church's opposition to contraception. He reported that there is only one priest under the age of 40 in the entire diocese of Killala; only two priests have been ordained over the last 17 years, and there have been no candidates for the priesthood since 2013. Hegarty blames this decline on the Church's positions on female ordination, contraception and sexuality. A continued requirement for children entering Irish Catholic owned schools to be baptized keeps the overall level of baptisms high, though the number of individuals practicing a faith or attending church is decreasing. Problems arising from the sexual abuse of children and the historical persecution of single mothers and their families have also greatly contributed to the decline of Catholicism in Ireland.

Netherlands

The Netherlands has tolerated greater religious diversity among Christian sects than Scandinavian countries, where "automatism" (default registration in the Lutheran Church by birth) has been the norm. Non-denominationalism increased in the Netherlands during the 19th century. This process slowed between the 1930s and 1960s, after which non-denominational affiliation increased at very high levels. The Church's ministry to the poor was not needed in the modern Netherlands that had developed systems of government welfare and secular charity. The declining influence of religious institutions in public life allowed great religious, philosophical and theological pluralism in the private and individual spheres of Dutch society. During the 1960s and 1970s, pillarization began to weaken and the population became less religious. In 1971, 39% of the Dutch population were members of the Roman Catholic Church; by 2014, their share of the population had dropped to 23.3% (church-reported KASKI data), or to 23.7% (large sample survey by Statistics Netherlands in 2015). The proportion of adherents of Calvinism and Methodism declined in the same period from 31% to 15.5%. In 2022, the diocese of Amsterdam announced that 60% of Catholic churches (approximately 100 churches total) would be closing there in the next five years.

In 2015, Statistics Netherlands, the government institute that gathers statistical information about the Netherlands, found that Christians comprised 43.8% of the total population. With only 49.9% of the Dutch currently (2015) adhering to a religion, the Netherlands is one of the least religious countries of the European Union, after the Czech Republic and Estonia. By the 1980s, religion had largely lost its influence on Dutch politics, and as a result Dutch policy on women's rights, abortion, euthanasia, homosexuality and prostitution became very liberal in the 1980s and 1990s. As a result of the decline, the two major strands of Calvinism, the Dutch Reformed Church and the Reformed Churches in the Netherlands, together with a small Lutheran group, began to cooperate as the Samen op weg Kerken ('Together on the road churches'). In 2004, these groups merged to form the Protestant Church in the Netherlands.

As of 2015, 63% of Dutch people think that religion does more harm than good. A quarter of the population thinks that morality is threatened if no one believes in God, down from 40% in 2006. The number of people reporting that they never pray rose from 36% in 2006 to 53% in 2016. In 2015, Statistics Netherlands found that 50.1% of the adult population declared no religious affiliation.

Poland

In 2021 Polish census, 71.3% of Polish people identified as Catholic, although 20.53% refused to answer the question about their religion. A 2022 poll showed that 84% of Polish people identify as Catholic, but only 42% are practicing Catholics, and among 18-24 year olds only 23% are practicing Catholics, compared to 69% in 1992. The Catholic sex abuse scandal, the large restrictions on abortions in Poland contributed to this decline in Catholicism among the younger generations.

Italy and Spain

Adherence to established forms of church-related worship is in rapid decline in Italy and Spain, and Church authority on social, moral and ethical issues has been reduced. Daily church attendance has declined but Catholicism still remains the predominant religion in Spain and Italy. However, according to the Spanish Center for Sociological Research, 55.6% of Spaniards self-identified as Catholic in 2023, but only 18.3% claimed to be "practicing" Catholics.

In Italy, about 68% of participants in a 2023 poll by Ipsos self-identified as "Christians". However, although most of the population claims religious affiliations, according to the Italian National Institute of Statistics (ISTAT) data, less than 19% of Italians have declared themselves to be practicing. While the proportion of those who have never practiced a religion has doubled, from 16% in 2001 to 31% in 2022.

United Kingdom

In 2021 census in England and Wales, 46.2% of the population identified as Christian. Around 37.2% of the population identified as irreligious.

Attendance at Anglican churches had begun to decline in the United Kingdom by the Edwardian era, with both membership in mainstream churches and attendance at Sunday schools declining. Infant baptism declined after World War II. In 2014, Archbishop of Canterbury Rowan Williams stated that the UK had become a "post-Christian country". That same year, only 4.3% of the population participated in a Church of England (C of E) Christmas service. Nevertheless, around 60% of all respondents still identified as Christians in the 2011 Census.

The Roman Catholic Church has witnessed the highest retention rate among all Christian denominations. In 2015, 9.2% of the UK population was Catholic. According to scholar Stephen Bullivant, based on the British Social Attitudes Survey and European Social Survey, the decline in Anglicanism has slowed thanks to "the return of patriotism and pride in Christianity", and the number of followers of the Anglican Church has increased slightly by 2017. This growth however is still below that needed and is mainly from African immigrants. Anglicanism has been majority African since 2001. In 2017, a report commissioned by the Christian group Hope Revolution indicated that 21% of British youth identified as "active followers of Jesus".

According to the 2018 British Social Attitudes Survey (BSA), 33% of over-75s identified as C of E, while only 1% of people aged 18−24 did so. The report stated that "Britain is becoming more secular not because adults are losing their religion but because older people with an attachment to the C of E and other Christian denominations are gradually being replaced in the population by younger unaffiliated people."

In the 2022 Scotland census, for the first time a majority of people stated that they did not identify with any religion - 51.1%, up from 36.7% in 2011.

Oceania

Australia

The percentage of people belonging to some form of Christianity decreased from 52.2% the 2016 Census to 43.9% in the 2021 Census. Meanwhile, those declaring that they had no religion increased from 30% in the 2016 Census to 38.9% in the 2021 Census. In a 2017 survey of teenage Australians aged 13–18, 52% declared that they had no religion, compared with 38% Christian, 3% Muslim, 2% Buddhist and 1% Hindu.

The only form of Christianity that showed a significant growth in 2016 Census is the Pentecostal church, increased from 2.1% up from 1.7% in 2016. However, like other forms of Christianity, it also has declined in 2021 Census. Most of the followers of the Pentecostal churches are young as the average age among them is 25.

New Zealand

In New Zealand, there has been a decrease in Christianity and increase in the population declaring "No religious affiliation". The reason for this is attributed to the decline in belief in institutional religion and increase in Secularism. In the 1991 census, 20.2% of the New Zealand population followed No religion.

This proportion more than doubled in two decades, to reach 41.9% in the 2013 census, and the figure increased again to 48.2% in the 2018 census. In 2023 Census, the figure reached 51.6%, crossing the 50% mark for the first time. At the same time, the Christian population declined from 37.31% in 2018 Census to 32.3% in 2023. In the 2018 Census, the New Zealand population claiming "No religion" officially overtook Christianity.

North America

Canada

In 2021, Statistics Canada found that only 68% of Canadians 15 years and older reported having a religious affiliation, marking the first time the number had dipped below 70% since StatCan began tracking religious affiliation in 1985. Christianity remains the largest religion in Canada, in the 2021 census, 53.3% of the population identified as Christians.

In Quebec, since the Quiet Revolution, over 500 churches (20% of the total) have been closed or converted for non-worship based uses. In the 1950s, 95% of Quebec's population went to Mass; in the present day, that number is closer to 5%. Despite the decline in church attendance, Christianity remains the largest religion in Quebec, where 64.82% of people were Christians, according to 2021 census.

With the loss of Christianity's monopoly after having once been central and integral to Canadian culture and daily life, Canada has become a post-Christian and secular state.

Mexico

Although Mexico is the second largest Catholic country in the world in terms of members, Catholicism has been declining over the past 30 years, from 89.7% of the population in 1990 to 77.7% in 2020. The number of Catholics in Mexico have decreased by 20.5% since 1950. In 2020, 8.1% of Mexicans did not identify with any religion.

United States

Christianity, the largest religion in the United States, experienced a 20th-century high of 91% of the total population in 1976. This declined to 73.7% by 2016 and 64% in 2022. The Evangelical Lutheran Church in America (ELCA) lost about 30% of its congregation and closed 12.5% of its churches: the United Methodist church lost 16.7% of its congregation and closed 10.2% of its churches. The Presbyterian Church had the sharpest decline, losing over 40% of its congregation and 15.4% of its churches between 2000 and 2015. Infant baptism has also decreased; nationwide, Catholic baptisms declined by nearly 34%, and ELCA baptisms by over 40%.

In a study published in 2022, Pew Research Center projected that if the rate of decline continues to accelerate, Christians will make up less than half of the American population by 2070, with estimated ranges for that year falling between 35% and 46% of the American population. In 2024, Pew Research Center published a study stating that the percentage of American adults who identify as religiously unaffiliated, known as "nones", numbered 28%, higher than Catholics at 23% and Evangelical Protestants at 24%.

In 2019, 65% of American adults described themselves as Christians. In 2020, 47% of Americans said that they belonged to a church, down from 70% in 1999; this was the first time that a poll found less than half of Americans belonging to a church. Nationwide Catholic membership increased between 2000 and 2017, but the number of churches declined by nearly 11% and by 2019, the number of Catholics decreased by 2 million people, dropping from 23% of the population to 21%. Since 1970, weekly church attendance among Catholics has dropped from 55% to 20%, the number of priests declined from 59,000 to 35,000 and the number of people who left Catholicism increased from under 2 million in 1975 to over 30 million today.

In 2022, there were fewer than 42,000 nuns in the United States, a 76% decline over 50 years, with fewer than 1% of nuns under age 40. The Southern Baptist Convention has experienced decline: between 2006 and 2020, it lost 2.3 million members, representing a 14% decrease in membership during that period. The Lutheran Church – Missouri Synod reported in 2021 that the denomination has been declining in membership. In 2020, the church reported approximately 1.8 million total baptized members, a decline from its peak in 1971 when it reported nearly 2.8 million total baptized members.

The 2014 Religious Landscape Study found a large majority of those who were raised as Christians in the United States still identify as such (retention rate of 87.6% among those raised Christian), while those who no longer identify as Christians mostly identify as religiously unaffiliated. More recent studies have found a retention rate closer to 67%, with one-third of those who were Christian in childhood leaving the religion by age 30. The 2014 study found that 84% of all adults who were raised as historically black Protestant continue to identify as such or identify now with different Christian denominations, Evangelical Protestant (81%), Mormon (76%), Catholic (75%), Orthodox Christian (73%), mainline Protestant (70%), and Jehovah's Witnesses (62%) continue to identify as such or identify now with different Christian denominations. Significant minorities of those raised in nearly all Christian denominational families now say they are unaffiliated, ranging from 13% among those raised historically black Protestant to 35% of those raised Jehovah's Witnesses. A small minority of those raised in nearly all Christian denominational families identify now with another faith, ranging from 3% among those raised historically black Protestant, Evangelical Protestant, Mormon, Orthodox Christian, and Jehovah's Witnesses to 4% of those raised Catholic and mainline Protestant. A 2022 Pew Research study found that 30% of Latinos in the United States were religiously unaffiliated, and half of Latinos age 18-29 were religiously unaffiliated.

In 2018, the Minneapolis Star Tribune reported that churches in Minnesota were being closed due to dwindling attendance. Mainline Protestant churches in Minnesota have seen the sharpest declines in their congregations. The Catholic Church has closed 81 churches between 2000 and 2017; the Archdiocese of Saint Paul and Minneapolis closed 21 churches in 2010 and has had to merge dozens more. In roughly the same time frame, the Evangelical Lutheran Church in America in Minnesota has lost 200,000 members and closed 150 churches. The United Methodist Church, which is Minnesota's second-largest Protestant denomination, has closed 65 of its churches. In the early 1990s, the Archdiocese of Chicago closed almost 40 Catholic churches and schools. In 2016, increasing costs and priest shortages fueled plans to close or consolidate up to 100 Chicago Catholic churches and schools in the next 15 years. The Archdiocese of New York announced in 2014 that nearly one-third of their churches were merging and closing. The Archdiocese of Boston closed more than 70 churches between 2004 and 2019. In 2021, the Archbishop of Cincinnati announced that 70% of Catholic churches would be closing there in the next several years. In May 2023, the Archbishop of St. Louis announced the closing of 35 parishes. In 2024, the Archdiocese of Baltimore announced that two thirds of their parishes would be closing. In 2024, the Catholic Diocese of Buffalo, New York announced the closing of 89 churches. Nationally as of 2020, Catholic school enrollment declined by more than 430,000 students since 2008.

Moderate and liberal denominations in the United States have been closing down churches at a rate three or four times greater than the number of new churches being consecrated. However, according to The Christian Century, the rate of annual closures is approximately 1% and quite low relative to other types of institutions. It has been asserted that of the approximately 3,700 churches that close each year, up to half are unsuccessful new churches. The more conservative evangelical denominations have also declined, representing 23% of the population in 2006 and 14% in 2020 according to the Public Religion Research Institute.

The Orthodox Church and the denominations like Jehovah's Witnesses, the Church of Jesus Christ of Latter-day Saints, and Pentecostals had slight increases in membership between 2003 and 2018, but the number of adults in the United States who do not report any religious affiliation nearly doubled over that period. However, in 2021, the Greek Orthodox Archdiocese of America, the largest Orthodox church in the United States, reported membership losses during a 40-year period. In 2015, Pew Research Center reported a decline among the Orthodox Churches in the United States.

The Public Religion Research Institute's 2020 Census of American Religion showed that the overall decline of white Christians in America had slowed, stabilizing at around 44% of the population. It also showed that, contrary to expectations, white evangelicals had continued to decline and that they were now outnumbered by white mainline Protestants. Conversely, the Pew Research Center found in 2022 that the decline had continued to accelerate over the previous fifty years.

An article written by Adam Gabbatt in April 2021 for the British newspaper The Guardian claimed that an "allergic reaction" to conservative Christians had caused the decline of the religion as a whole, primarily towards how certain conservative Christians generally do not support the advancement of LGBT rights and abortion rights, a perspective primarily shared by younger people like millennials. Gabbatt and other researchers interviewed in the article particularly blame the Republican Party for pushing social conservative policies.

South America

Chile

Despite other countries of South and Central America and also Caribbean who had seen an increasing of religiosity the last 30 years, cases of sexual abuse, attempts to hide information, and interference in government affairs have been the main causes of the decline of Christianity in Chile. According to the public broadcaster TVN, the number of Chileans who declare themselves Catholics fell from 73% in 2008 to 45% in 2018. In addition, it is the Latin American country that has less trust (36%) in the Church throughout the region according to Latinobarómetro. 63% of the Chilean population profess some branch of Christianity, according to the Encuesta Nacional Bicentenario identifies as Christian, with an estimated 45% of Chileans declaring to be part of the Catholic Church and 18% of Pentecostal churches. 5% of the population adhere to other religion.

Attempts to restore the Roman Catholic Christian faith in Chile have failed. The Argentine newspaper Clarín reported that Pope Francis's State visit to Chile in 2018 "had been the worst in his five years of pontificate." After the papal visit, the crisis in the Chilean Catholic Church increased. According to the Bicentenario survey, atheism has grown from 21% in 2018 to 32% in 2019 and then to 36% in 2020 and 37% in 2021. Despite the decline of Roman Catholic Church, Pentecostalism still maintains the same percentage of adherents since 2012.

Uruguay

Uruguay is one of the world's most secular nations. A recent AmericasBarometer study indicated that almost 63% of Uruguayans are unaffiliated. The LatinoBarometro survey puts the number at 47%.

See also

• God is dead
• Church attendance
• Irreligion
• Postchristianity
• Secularization

Notes

1. ^ Hugh McLeod, emeritus professor of Church History at the University of Birmingham, provides a helpful summary of the decline of Christendom in Western Europe in four stages: 1 Toleration of alternative forms of Christianity (in the Reformation and post-Reformation era in the 16th century and onward). 2 Publication of literature that was critical of Christianity (in the Enlightenment era of the 18th century). 3 Separation of church and state (from the 18th century onward). 4 The "gradual loosening of the ties between church and society". At least since the mid-20th century, many European countries have experienced a decline in churched religion. In particular, declining church attendance has been an important aspect of this process, and a characteristic of the development that has been described as the secularization process. The secularization processes in the Western world involve a partial replacement of established Christianity by unchurched spirituality, characterized by á la carte religion and a focus on "me and my experiences".
2. The ISTAT (the National Institute of Statistics), in surveying a whole range of news about the daily life of the population each year, also includes the question "Habitually how often do you go to church or other place of worship?", while it does not record religious affiliation, which is considered a "sensitive" data.
3. In the last survey year (2022), regular practice involves 15% of the male population and 22% of the female population in Italy.

References

1. "Religion in Latin America, Widespread Change in a Historically Catholic Region". Pew Research Center. 13 November 2014. Retrieved 4 March 2015.
2. ^ "Being Christian in Western Europe" (PDF). Pew Research Center's Religion & Public Life Project. 29 May 2018. Retrieved 21 January 2021.
3. "Religions in Canada—Census 2011". Statistics Canada/Statistique Canada. 8 May 2013.
4. "North America: Canada — The World Factbook - Central Intelligence Agency". www.cia.gov. 7 June 2022.
5. "The American Religious Landscape in 2020s". Public Religion Research Institute. 8 July 2021. Retrieved 10 July 2021.
6. ^ Bullivant, Stephen (2018). Europe's Young Adults and Religion: Findings from the European Social Survey (2014-16) to inform the 2018 Synod of Bishops (PDF) (Report). St Mary's University's Benedict XVI Centre for Religion and Society; Institut Catholique de Paris. Archived from the original (PDF) on 22 March 2018.
7. Sherwood, Harriet (21 March 2018). "'Christianity as default is gone': The rise of a non-Christian Europe". The Guardian. London. Retrieved 15 December 2018.
8. "In U.S., Decline of Christianity Continues at Rapid Pace". Pew Research Center's Religion & Public Life Project. 17 October 2019. Retrieved 12 August 2021.
9. Bargsted, Matías; M. Somma, Nicolás; Valenzuel, Eduardo (2019). Atheism and Nonreligion in Latin America, Geography. Springer Publishing. pp. 137–142. ISBN 9781135980795.
10. ^ Lipka, Michael, ed. (2 April 2015). "2. Religious Groups (2.1: Christians)" (PDF). The Future of World Religions (Report). Pew Research Center. pp. 59−69. Archived from the original on 29 April 2015. Retrieved 4 May 2016. p. 67: Worldwide, religious switching is projected to have a modest impact on changes in the Christian population. Christians would make up a slightly larger share of the world's inhabitants in 2050 (32% rather than 31%) if religious switching were not taken into account. Full report PDF
11. Lipka, Michael, ed. (2 April 2015). "Overview" (PDF). The Future of World Religions (Report). Pew Research Center. pp. 5−23. Archived from the original on 29 April 2015. Retrieved 4 May 2016. p. 11: In the projection model, all directions of switching are possible, and they may be partially offsetting. In the United States, for example, surveys find that some people who were raised with no religious affiliation have switched to become Christians, while some who grew up as Christians have switched to become unaffiliated. Full report PDF
12. ^ Haynes, Jeff (13 October 2014). Religion in Global Politics. Routledge. ISBN 978-1-317-88667-9.
13. ^ Jenkins, Philip (2007). "The Christian Revolution". The Next Christendom: The coming of global Christianity (Revised and expanded ed.). Oxford: Oxford University Press. ISBN 978-0195183078.
14. ^ "Protestantism: The fastest growing religion in the developing world". The Manila Times. 18 November 2017. At the heart of this religious resurgence are Islam and Pentecostalism, a branch of Protestant Christianity. Islam grew at an annual average of 1.9 percent between 2000 and 2017, mainly as the result of a high birth rate. Pentecostalism grew at an average of 2.2 percent each year, mainly by conversion. Half of developing-world Christians are Pentecostal, evangelical or charismatic (all branches of the faith emphasize the authority of the Bible and they also emphasize the need for a spiritual rebirth). Why are people so attracted to it?.
15. ^ "Why is Protestantism flourishing in the developing world?". The Economist. 18 November 2017. Pentecostalism grew at a rate of 2.2 percent each year, mainly by conversion. Half of developing-world Christians are Pentecostal, evangelical or charismatic.
16. "The Changing Global Religious Landscape". Pew Research Center's Religion & Public Life Project. 5 April 2017. Retrieved 13 July 2021.
17. Miller, Donald E; Sargeant, Kimon H; Flory, Richard, eds. (9 September 2013). Spirit and Power: The Growth and Global Impact of Pentecostalism. Oxford University Press Scholarship. doi:10.1093/acprof:oso/9780199920570.001.0001. ISBN 978-0-19-934563-2. Pentecostalism is the fastest-growing religious movement in the world
18. Anderson, Allan; Bergunder, Michael; Droogers, Andre (9 May 2012). Studying Global Pentecostalism: Theories and Methods. University of California Press Scholarship. doi:10.1525/california/9780520266612.001.0001. ISBN 9780520266612. With its remarkable ability to adapt to different cultures, Pentecostalism has become the world's fastest growing religious movement.
19. "Pentecostalism—the fastest growing religion on earth". ABC News. 30 May 2021.
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• Christianity and society
• Disengagement from religion
• Postmodernism
• Criticism of Christianity
• Secularization
• Western culture