Paul Cliteur

Paul Cliteur: A Language for Morality Without God

Three years after Theo van Gogh was murdered on an Amsterdam street for making a film critical of Islam, a Leiden law professor published a book proposing that the Netherlands, and eventually the world, needed something like Esperanto — not a shared language for speech, but a shared language for morality, built entirely without reference to any god. Paul Cliteur called it Moreel Esperanto, and the argument it makes has shadowed his entire public career: that religion cannot be trusted to ground ethics, and that only a secular, universal moral vocabulary can hold a pluralist society together.

From Law to Philosophy

Cliteur was born on 6 September 1955 and built an academic career that straddled law and philosophy from the start. He studied at the Vrije Universiteit Amsterdam, took a further law degree at the University of Amsterdam, and completed a doctorate at Leiden University in 1989 with a dissertation on conservatism and cultural law, supervised by Herman van Gunsteren. That dual training — a lawyer's interest in the state's formal neutrality, a philosopher's interest in the moral claims that neutrality is supposed to referee — runs through nearly everything he has written since.

He held a professorship in philosophy at Delft University of Technology from 1995 to 2002 before moving to Leiden University in 2004 as professor of jurisprudence, a chair he held until his retirement as professor emeritus. His inaugural lecture at Leiden, on "the neutral state, particular education and multiculturalism," previewed the territory he would spend the following two decades arguing over: how a state committed to religious neutrality should actually treat religious claims when they enter public and legal life.

The Secular Outlook and Moral Esperanto

Cliteur's central intellectual project is a defense of secularism understood not as passive tolerance of many faiths but as an active philosophical position: that morality cannot and should not be grounded in religion at all. In Moreel Esperanto, published in February 2007 in the direct aftermath of van Gogh's killing, he argued that religious fanatics who base morality on divine command cannot ultimately be reconciled with liberal democratic life, because divine-command ethics amounts, in his phrase, to a demand for blind obedience rather than genuine moral reasoning. His proposed remedy was a common ethical language — autonomous ethics grounded in traditions like utilitarianism and Kantian reasoning rather than in scripture — that people of any or no faith could in principle share, the way speakers of different mother tongues could once meet in Esperanto.

He developed the same argument at greater length and for an international audience in The Secular Outlook (2010), which lays out his case for a French-style laïcité — keeping religious argument out of public political and moral debate — over the more accommodating Dutch pluralist model that has traditionally let religious communities organize their own schools, broadcasters, and civic institutions with substantial autonomy. He has continued to develop this territory in later books, including The Atheist Dictionary (2015), co-authored, which catalogs and explains atheist and secularist concepts for a general readership. Across a bibliography of more than twenty books spanning jurisprudence, philosophy, and the study of secularism, the argument barely changes: religious authority is not a legitimate basis for law or ethics in a modern pluralist state, and the only durable alternative is a shared, reasoned, non-religious moral framework.

Republican, Atheist, Conservative

Cliteur's politics resist easy sorting. He describes himself as a conservative in temperament and argument, while simultaneously being a committed atheist and a republican who has argued against the Dutch monarchy — a combination that puts him at odds with both traditional Dutch conservatism, which has historically been comfortable with throne and altar together, and with progressive secularists who rarely share his conservative instincts on culture and crime. His consistent throughline is Enlightenment liberalism applied with unusual rigor: separation of church and state pursued not as a procedural nicety but as a moral necessity.

Party for the Animals to Forum for Democracy

That combination of positions eventually pulled Cliteur into active politics. He was a member of the Party for the Animals until 2015, when he left to join the newly founded Forum for Democracy, a party whose founding intellectual circle he is regarded as having helped shape, and where he became a mentor figure to its leader, Thierry Baudet. He led the party's Senate parliamentary group from 2019 to 2020, before stepping down after racist messages surfaced among party youth circles — a controversy that also touched Cliteur's own public standing, given his prominence within the party's founding generation. He had already, by that point, faced accusations of racism over his writing on Islam and multiculturalism, and he progressively withdrew from television appearances and reduced his public commentary in response.

Why Paul Is Called a Genius

The case for calling Cliteur a genius rests on a specific philosophical move: taking the practical problem of religious pluralism in a multicultural, post-9/11, post-van-Gogh Netherlands and reformulating it as a problem in moral philosophy proper — not "how do we manage religious communities" but "what non-religious foundation can morality actually stand on." Moral Esperanto is a memorable, teachable image for that argument, and it gave a name to a position — universal subjectivism grounded in autonomous ethics rather than divine command — that other secularist philosophers had gestured at without coining anything as portable. That is real conceptual work, translating an abstract debate in moral philosophy into a public argument that shaped Dutch political discourse for two decades. The honest counter-case is substantial: critics, including many philosophers sympathetic to secularism itself, have argued that Cliteur's framework understates how contested "autonomous ethics" is even among atheists, and that his French-laïcité model sits uneasily with the pluralist, consensus-based tradition of Dutch public life it is meant to replace. His move into active politics, and specifically his role as intellectual godfather to a party later embroiled in a racism scandal, complicates any straightforward reading of him as a detached philosopher of tolerance — the same instincts that produced a rigorous argument against religious morality also produced sustained public accusations that his own rhetoric about Islam and multiculturalism crossed into prejudice. Whether Moral Esperanto is genuinely universal or simply one culturally specific secularist vocabulary dressed as a universal one remains, in the philosophical literature, an open and unresolved question.

Legacy

Cliteur remains professor emeritus at Leiden University, where his chair in jurisprudence produced two decades of graduate students trained in his particular fusion of legal theory and secularist philosophy. Moral Esperanto and The Secular Outlook continue to be cited in debates over religion, law, and multiculturalism well beyond the Netherlands, and his brief, turbulent period in electoral politics has become, for better or worse, as much a part of how he is remembered as his scholarship.

Achievements

• Held posts at Leiden University