[2][3] Alpha originated in 1977 with the work of Charles Marnham, a curate at Holy Trinity Brompton (HTB), a parish of the Church of England in London.
[4] It started as a course for church members regarding the basics of beliefs commonly held by many believers in Christ, but then began to be used as an introduction for those interested in the faith.
John Irvine, Marnham's successor curate at HTB, took over the running of the course in 1981 and developed the 10-week format that continues to this day.
This series is mainly presented by Nicky Gumbel, Toby Flint (a curate at Holy Trinity Brompton) and Gemma Hunt.
Several relationship-oriented programmes have emerged alongside Alpha that are now separately run by a sister organisation called Relationship Central.
[11] Unlike Alpha, there are no group sessions - the couple are to spend the time together, and relationship details are not shared with a counsellor or other participants.
[11] The Marriage Course was adopted by the British Army and an additional session on enforced separation (e.g. as a result of operational deployment) was added by a military couple working in co-operation with Relationship Central.
Nicky Gumbel says (quoting the current Apostolic Preacher Raniero Cantalamessa),[17] "What unites us is infinitely greater than what divides us."
"[21] Rob Warner addresses both, when he says: "Alpha can ... be summed up as [Nash] camp rationalistic conservatism combined with Wimberist charismatic expressivism ... this is a highly unusual, even paradoxical hybrid.
[25] Father Raniero Cantalamessa, a monk of the Order of Friars Minor Capuchin and Preacher to the Papal Household for Pope Benedict XVI wrote a document praising Alpha in June 2005.
[28] More conservative critics (especially from a Reformed and evangelical perspective) have complained that the course does not adequately define sin, and therefore does not properly explain the reason for Jesus's death and resurrection.