Democrats 66

Democrats 66 (Dutch: Democraten 66; D66) is a social liberal and progressive political party in the Netherlands, which is positioned on the centre to centre-left of the political spectrum. It is a member of the Liberal International (LI) and the Alliance of Liberals and Democrats for Europe (ALDE). The party is led by Rob Jetten, who was elected party leader on 12 August 2023. Paul van Meenen, Rob Jetten and Gerben-Jan Gerbrandy are serving as the party's parliamentary leaders in the Senate, the House of Representatives and the European Parliament respectively.

Its name refers to its year of foundation, 1966. Initially, its main objective had been to democratise the Dutch political system, but it developed a broader social liberal ideology over time. D66 is especially popular among people who hold a university degree, and its voters are mostly concentrated in larger cities and in municipalities with an above-average number of wealthy residents. The party supplies a relatively large proportion of mayors, who are appointed rather than elected.

In the 1967 general election, D66 won 7 out of 150 seats in the House of Representatives. No new party had ever gained that many seats before. The party was in government from 1973 to 1977, 1981 to 1982, 1994 to 2002, 2003 to 2006 and 2017 to 2024. It currently holds nine seats in the House of Representatives, five seats in the Senate and three seats in the European Parliament.

Democrats 66 was founded on 14 October 1966 by a group of 44 people. Its founders were described as homines novi, although 25 of the 44 had previously been members of another political party. The initiators were Hans van Mierlo, a journalist for the Algemeen Handelsblad, and Hans Gruijters, a municipal councillor in Amsterdam for the People's Party for Freedom and Democracy (VVD). Van Mierlo became the party's political leader. The foundation of the party was preceded by the "Appeal 1966" on 10 October, in which the founders appealed to the people of the Netherlands to re-take their democratic institutions. The party renounced the 19th-century political ideologies, which dominated the political system and sought to end pillarisation. It called for radical democratisation of the Dutch political system, and for pragmatic and scientific policy-making.

The party participated in the 1967 general election, with Hans van Mierlo as its lead candidate. The party won an unprecedented seven seats in the House of Representatives. In the 1971 general election, the party won an additional four seats and it formed a shadow cabinet with the Labour Party (PvdA) and the Political Party of Radicals (PPR). In the 1972 general election, the three parties formed a political alliance called the "Progressive Agreement" (Dutch: Progressief Akkoord; PAK) and presented the common electoral program "Turning Point '72" (Keerpunt '72).

In the election, D66 lost nearly half its seats, retaining only six. The alliance became the largest political force in the country, but it did not gain a majority. After long cabinet formation talks, the three PAK-parties formed an extra-parliamentary cabinet joined by progressive members of the Anti-Revolutionary Party (ARP) and the Catholic People's Party (KVP). The cabinet was led by Labour politician Joop den Uyl. Co-founder Hans Gruijters became Minister of Housing and Spatial Planning. After the formation talks, Van Mierlo left politics, feeling that his political position within the parliamentary party was untenable. Van Mierlo was replaced by Jan Terlouw, who became the new parliamentary leader.

In the period 1972–1974, the party had a dramatic loss of members (from 6,000 to 300) and polled very poorly in the 1974 provincial elections. The party also lost half of its senators in the 1974 Senate election. At one of the party congresses, a motion was put forth to abolish the party. A majority of the members voted in favour, but the two-thirds majority was not reached. In reaction, Terlouw started a campaign to revitalise the party, involving a membership drive and a petition to the electorate. He emphasised issues other than democratic reform and gave the party a more liberal orientation. The party doubled its membership in 1975 and won two additional seats in the 1977 general election, despite losing all its seats in the Senate in the same year.

In the 1981 general election, D66 gained 17 seats. The party formed a government with the Labour Party and the Christian Democratic Appeal (CDA), with Terlouw as Minister of Economic Affairs. The cabinet was characterised by the personal and ideological conflicts between Prime Minister Dries van Agt (CDA) and Minister of Social Affairs Joop den Uyl (PvdA). The cabinet fell nine months after it was formed, when the Labour Party left the cabinet. D66 and the CDA continued to govern in a caretaker government. In the subsequent 1982 general election, D66 lost two-thirds of its support, and was left with only 6 seats. After the election, Terlouw left politics and was replaced by Maarten Engwirda. The party was confined to opposition.