Rationalist Association: A History of Freethought and Publishing in the UK
For over a century, the Rationalist Association served as a cornerstone for intellectual independence and secular inquiry in the United Kingdom. Founded on the principle of promoting reason over dogma, the organization spent decades providing a platform for thinkers, scientists, and philosophers whose works were often deemed too provocative for mainstream publishers.
From its origins as a response to the political shift of the British secularist movement to its eventual merger with Humanists UK in 2025, the association played a pivotal role in democratizing access to scientific and philosophical literature.
Key Facts
- Founded: 1885 by Charles Albert Watts.
- Primary Purpose: Publishing and distributing literature based on reason, science, and freethought.
- Notable Publication: New Humanist magazine.
- Peak Membership: Over 5,000 members by 1959.
- Current Status: Merged into Humanists UK in 2025; now operates as the Rationalist Press publishing imprint.
The Formation of the Rationalist Press Association
The organization began as the Rationalist Press Association (RPA) in 1885. It was established by Charles Albert Watts and a group of freethinkers—individuals who rely on reason and evidence rather than tradition or faith—who felt the British secularist movement had become too political and lacked intellectual depth.
The RPA was designed to solve a practical problem: many booksellers refused to stock secularist or anti-religious texts. To circumvent this, Watts formed the Propagandist Press Committee in 1890, with George Jacob Holyoake serving as president. This committee evolved into the Rationalist Press Committee and finally became the Rationalist Press Association in 1899.
The association operated on a subscription model, where members paid a fee in exchange for annual books of equivalent value. This ensured a steady stream of intellectual material reached a dedicated audience.

Intellectual Impact and the Thinker's Library
The RPA gained significant momentum after 1902 by publishing serious scientific works from renowned authors such as Julian Huxley, Ernst Haeckel, and Matthew Arnold. However, its most enduring contribution was the Thinker's Library series.
Published by Watts & Co. between 1929 and 1951 under the leadership of Fredrick Watts, the Thinker's Library provided affordable reprints of classic literature and philosophical works, including texts by Charles Darwin and John Stuart Mill. By publishing material that was often considered too heretical for mainstream outlets, the RPA fueled a growing zeal for rationalism and agnosticism across the UK.
Growth and Eventual Decline
The association reached its zenith in 1959 with a membership exceeding 5,000. Ironically, its own success contributed to its eventual decline. As rationalist and scientific literature became more widely accepted, larger mainstream publishers began producing similar works, drawing the RPA's readership away and leading to a steady drop in membership.
Evolution and Merger with Humanists UK
In 2002, the organization rebranded as the Rationalist Association and became a charity. It continued to advocate for secularism and intellectual freedom, appointing notable figures such as Jonathan Miller as president in 2006. Miller highlighted the importance of the community, noting that while non-belief is widespread, the organized community of non-believers is often overlooked.
In January 2025, the Rationalist Association merged with Humanists UK. As part of this transition, the original 1885 RPA became the publishing imprint of Humanists UK, known as the Rationalist Press, which continues to publish the quarterly New Humanist magazine.
Summary of Organization Details
| Attribute | Details |
|---|---|
| Founder | Charles Albert Watts |
| Founded Year | 1885 |
| Key Publications | New Humanist, Thinker's Library |
| Peak Membership | 5,000+ (1959) |
| Current Parent Org | Humanists UK (since 2025) |
| Current President | Laurie Taylor |
| Chair of Trustees | Clive Coen |
Notable Presidents
The association was led by a distinguished array of intellectuals and public figures over the decades:
- Herbert Leon (1913–1922)
- Harold Laski (1929–1933)
- Bertrand Russell (1955–1970)
- Barbara Wootton (1970–1973)
- Hermann Bondi (1982–1999)
Frequently Asked Questions
What was the primary goal of the Rationalist Press Association?
The RPA aimed to provide an intellectual foundation for the secularist movement by publishing and distributing scientific, philosophical, and anti-religious literature that mainstream publishers often refused to handle.
What was the Thinker's Library?
The Thinker's Library was a series of affordable reprints of classic intellectual works, including those by Charles Darwin and John Stuart Mill, published between 1929 and 1951.
Why did the association's membership decline?
The decline was largely due to the mainstreaming of rationalist literature. As larger publishers began offering similar content, the specialized role of the RPA diminished, leading to a loss of subscribers.
What happened to the Rationalist Association in 2025?
The Rationalist Association merged with Humanists UK. The original RPA now serves as the publishing imprint for Humanists UK, and the organization continues to publish New Humanist magazine.
Who were some of the key figures associated with the organization?
Key figures include founder Charles Albert Watts, long-term president Bertrand Russell, and more recent president Jonathan Miller.