How a Dutch political experiment born in 1966 became the nation's leading power
In short: Founded by 44 individuals seeking to dismantle the rigid pillarisation of Dutch society, Democrats 66 began as a radical call for democratic reform. After decades of fluctuating electoral fortunes, internal crises, and coalition compromises, the party has evolved into a central force, recently securing the Prime Ministership for the first time.
Established on 14 October 1966, Democrats 66 (D66) emerged from the 'Appeal 1966' to challenge the 19th-century ideologies that defined the Dutch political landscape. Led by journalist Hans van Mierlo, the party initially prioritized radical systemic changes, including the direct election of mayors and the abolition of the Senate. Its name, originally Democrats '66, was chosen to project a modern, forward-looking image, though the apostrophe was eventually dropped in 1985 as the brand matured.
The party's history is marked by extreme volatility. In 1967, it achieved a historic seven seats in its first general election, yet by 1974, membership had plummeted from 6,000 to just 300, nearly leading to the party's dissolution. Survival required a pivot toward broader social-liberal policies under leaders like Jan Terlouw. Throughout the 1990s and early 2000s, D66 became known as the 'glue' in 'purple' coalitions, facilitating landmark progressive legislation such as the legalization of euthanasia and same-sex marriage, even as it faced internal friction over its participation in centre-right cabinets.
Today, D66 is a fixture of Dutch politics, drawing strong support from university-educated voters and urban centers like Amsterdam and Utrecht. The party's trajectory reached a new peak in the 2025 general election, where it secured 26 seats. This victory paved the way for Rob Jetten to become the first D66 Prime Minister in February 2026. With over 35,000 members, the party now balances its original reformist zeal with the pragmatic realities of leading a minority government.
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Sources
- Summary by Intellect · source: Democrats 66
- Also: Wikidata — Democrats 66 · CC0
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