[10] He began volunteering for both the British Humanist Association and the Citizenship Foundation, an organisation which aims to address democratic inequality on social, moral and political issues,[11] after graduating from Oxford.

[13] In December of the same year he won an award at the 2005 UK Young Education Programme, an organisation which promotes communication skills and rewards open debate on issues affecting society.

[13] In 2010 he became Humanists UK's youngest ever Chief Executive at the age of 29, having been appointed by the Board of Trustees the previous November,[15] a position which he described at the time as "obviously a daunting one", saying that he felt "a huge responsibility to build on the BHA's many successes.

Copson has written, edited and contributed to several books on secularism and humanism including: As author or editor: As contributor: Copson is a regular contributor to New Humanist magazine,[22] has written for The Guardian, New Statesman, The Times and The Independent, and has been interviewed on BBC News, ITV, Channel 4 and Sky[3] for non-religious opinions on topics such as religious symbols in the workplace and euthanasia.

"[8] Copson has also spoken widely on the subject of secularism, the separation of religion from the state, particularly in regard to children's education,[27] civil ceremonies such as marriages and funerals,[28] Human Rights law,[29] against the automatic right of unelected Anglican bishops to sit in the House of Lords[30] and the provision of religious chaplains in institutions such as the prison system and hospitals and hospices.

[34] He has also spoken frequently in regard to state education in England and the provision of non-religious schools and evidence-based teaching, both in his capacity as Chief Executive of the BHA and as a lifelong Humanist.

Copson commented: "It is vital that every young person receives a broad and balanced education, including teaching evolution as the only evidence-based view of how life came to be.

"[27] Copson has also spoken publicly about the murders in Bangladesh of atheist bloggers Washiqur Rahman, Avijit Roy and the attack on his wife Rafida Ahmed, and Ananta Bijoy Das, calling on the Bangladeshi government to "do more to protect all its citizens from brutal fundamentalist thugs who would kill another human being for daring to think outside the confines of dogmatic religion.