Pillarisation (a calque from the Dutch: verzuiling [vɛrˈzœylɪŋ] ⓘ) is a form of voluntary social segregation in which a society becomes arranged into several self-contained communities, or "pillars" (Dutch: zuilen), associated with specific political or confessional identities. The phenomenon is most closely associated with the Netherlands and Belgium in the 19th and 20th centuries.

In a pillarized society, a "pillar" is characterised by a self-contained network of institutions and social organisations which exist entirely separately from those of other "pillars". These have historically included trade unions, social clubs, farmers' associations, savings banks, co-operative shops, schools, hospitals, mutual organisations, universities, scouting groups, sports clubs and newspapers as well as political parties. It therefore limits interaction between members of different pillars even without significant residential segregation. Social relationships, including marriage, between people within different pillars were generally discouraged.

Society in the Netherlands was historically divided into four main pillars: Catholic, Protestant, socialist, and liberal.[1] Belgium, by contrast, only Catholic, socialist, and liberal pillars emerged. The system allowed each community to maintain its own institutions and lifestyle, minimising conflict among groups.[2] Pillarisation in both countries began to decline in the 1960s and 1970s through the weakening of social and political barriers. However, traces of pillarisation remain visible in contemporary Dutch political parties, media institutions, and in certain conservative religious communities, such as those in the Dutch Bible Belt.[1]

Comparable systems of social segmentation have been identified in other countries, including Northern Ireland, Switzerland, Austria, Cyprus, Lebanon, and Malaysia.

Pillarisation in the Netherlands

The Netherlands historically developed at least three main social pillars: Protestant, Catholic, and social democratic. Pillarisation in the country was initiated in the late 19th century by Abraham Kuyper, a theologian and politician associated with the Anti-Revolutionary Party (ARP), a Christian democratic and neo-Calvinist (gereformeerd) organisation connected to the Reformed Churches in the Netherlands. The movement was grounded in Kuyper's philosophy of sphere sovereignty,[4][failed verification] which held that distinct areas of life—such as religion, politics, and education—should operate autonomously within their own spheres.

Although pillarisation declined in the 1960s and 1970s, its influence remains evident in Dutch society, particularly in communities outside the Randstad region, where aspects of pillarised life persist alongside broader participation in civil society.[2][5]

The Catholic pillar was historically the most tightly organised, reflecting the Catholic clergy's encouragement of collective organisation within confessional institutions. The conservative Protestant pillar and the socialist pillar, which primarily represented the proletariat, were also highly cohesive.[6] The Christian Historical Union (CHU), founded in 1908 and associated with the Dutch Reformed Church (hervormd), aligned itself with the Protestant pillar shaped by the ARP rather than creating a separate structure.

Those outside the three main pillars—primarily middle and upper-class latitudinarian Protestants and atheists—were sometimes grouped into a liberal or "general" pillar. However, ties among liberal organisations were considerably weaker than within the other pillars. Liberals generally opposed the voluntary segregation of society and often denied that a liberal pillar existed.[6] The political parties commonly linked with this group included the Free-thinking Democratic League (VDB) and the Liberal State Party (LSP). Smaller groups such as communists, humanists, and Protestant fundamentalists also established their own organisations, though on a much smaller scale.

The growth of pillarisation in the Netherlands was supported by two parallel developments: the emancipation of the working and lower middle classes and the efforts of elites to maintain influence. The working-class emancipation led to the creation of socialist parties, trade unions, newspapers, cooperatives, and leisure organisations that provided comprehensive social support to their members, similar to patterns observed elsewhere in Europe. The rise of the Protestant pillar reflected the mobilisation of the conservative, often strongly religious lower middle class. While the Dutch bourgeoisie tended to espouse liberal or moderate Protestant beliefs, large segments of the lower middle class followed Kuyper's neo-Calvinism, which was both more traditional and more accessible to ordinary people than the established Protestant churches.[6]

Kuyper's doctrine of sphere sovereignty rejected both ecclesiasticism (the idea of church dominance over all social spheres) and statist secularism (the idea of state dominance over all spheres), arguing instead for distinct, autonomous domains within society. In 1879, Kuyper founded the Anti-Revolutionary Party (ARP) as the political expression of his religious movement and as the institutional foundation of the Protestant pillar.

Meanwhile, elites sought to retain control over emerging social movements: for example, Catholic clergy established confessional trade unions to prevent Catholic workers from joining socialist organisations. The creation of Christian political parties also reflected an effort to counterbalance the expanding influence of left-wing mass movements.[6]

Institutions by pillar

The following table shows the most important institutions by pillar:

  Protestant Catholic Socialist Liberal
Political party before 1945
  • AB (1904–1926)
  • RKSP (1926–1945)
 SDAP (from 1894)
Political parties after 1945
  • KVP (until 1977)
  • CDA (from 1977; ecumenical)
 PvdA (from 1945)
Broadcasting organisation
Unions
Employers PCW NKW none VNO
Newspapers
De Tijd (1845–1974)
De Volkskrant (since 1919)
Schools "School with bible" (Protestant oriented school), Protestant Education Roman Catholic School Free Schools, Public Schools Public Schools
Universities
Hospitals Green/Orange Cross White/Yellow Cross Green Cross
Sport clubs
NOC*NSF
Recreation (examples) Saturday football, weekend rugby union Sunday football Dancing schools, Sunday football, korfball Folk dancing, weekend rugby union, field hockey, weekend football

Depillarisation

Poster of the Nederlandsche Unie, an anti-pillarisation group that was at first embraced by the German occupying administration but later banned in 1941

After World War II, during which the Dutch resistance itself was divided along pillarised lines, political and social groups from across the spectrum—including liberals, socialists, Protestants, and Catholics—began questioning the existing pillarised system. In response, they founded the People’s Movement (Nederlandse Volksbeweging), a unity initiative intended to renew the political landscape through what became known as the doorbraak ("breakthrough") movement. Participants from various ideological backgrounds, including members of the Catholic resistance group Christofoor, sought to overcome divisions between the pillars and create a more integrated society.

Despite these efforts, the entrenched nature of pillarisation limited the movement's success. To promote unity, the Social Democratic Workers’ Party, the left-liberal Free-thinking Democratic League, and the Christian-socialist Christian Democratic Union merged to form the Labour Party (Partij van de Arbeid, PvdA), a progressive party intended to be open to all citizens. However, the PvdA failed to attract significant support from Catholic and Reformed voters and became primarily associated with the socialist pillar.

In the early years of radio and television broadcasting, pillarisation also influenced the organisation of media. While Dutch broadcasters were divided along pillar lines, the separation in television was relatively limited, as all broadcasters shared the Netherlands' single national television channel (expanded to two channels after 1964), which was viewed by the entire audience.

The 1960s marked a period of major social and political transformation. The pillars began to dissolve under criticism from emerging political movements, notably Democrats 66 (D66) and the New Left (Nieuw Links [nl]) faction within the PvdA. Rising mobility, affluence, and educational opportunities enabled greater contact among citizens from different backgrounds, reducing perceived differences between groups. Younger generations increasingly rejected affiliation with pillarised institutions, leading to the gradual decline of the system.

Between 1973 and 1980, the Anti-Revolutionary Party and the Christian Historical Union—both Protestant—merged with the Catholic People's Party to form the Christian Democratic Appeal (CDA). The new party first contested the 1977 Dutch general election. Similarly, cooperation between the Dutch Catholic Trade Union Federation (NKV) and the socialist Dutch Confederation of Trade Unions (NVV) began in 1976, culminating in their merger as the Federation of Dutch Trade Unions in 1982.

Although formal pillarisation diminished, its influence persisted into the 21st century. The Dutch public broadcasting system remains organised along multiple association-based lines rather than as a single entity. The country also continues to maintain both public and religious schools, a division rooted in pillarisation-era education policies.

Certain communities continue to exhibit pillar-like characteristics. As of 2014, members of the Reformed Churches in the Netherlands (Liberated) maintain their own schools, a national newspaper, and other organisations such as a labour union. Several pietist Reformed groups have similarly established their own schools, press outlets, and political movements. Muslim communities have increasingly utilised legal frameworks originally designed for pillarised institutions to create their own educational establishments.

Residual effects of pillarisation are still reflected in voting patterns. For example, regions that were historically Catholic strongholds often show distinctive political tendencies, including higher support for populist parties in contemporary elections.[7]