The blessing of same-sex marriages and same-sex unions is an issue about which Christian churches are in ongoing disagreement. These disagreements are primarily centered on the interpretation of various scripture passages related to homosexuality, and in some churches on varying understandings of homosexuality in terms of psychology, genetics and other scientific data. While various Church bodies have widely varying practices and teachings, individual Christians of every major tradition are involved in practical (orthopraxy) discussions about how to respond to the issue.
Those Christians and Churches which support blessing of same-sex unions do so from several perspectives:
In 2004, the then Archbishop of Canterbury, Rowan Williams, asked the Lambeth Commission on Communion to produce a report looking into the legal and theological implications flowing from decisions related to homosexuality that were apparently threatening the Anglican Communion, including decisions relating to the blessing of same-sex unions. Once published the Windsor Report led to the calling by the Lambeth Commission for a moratorium on the blessing of same-sex unions, and recommended that bishops who have authorised such rites in the United States and Canada "be invited to express regret that the proper constraints of the bonds of affection were breached by such authorisation." The report was roundly condemned by supporters of the gay and lesbian community, as well as by a number of theologians for its partiality. To date, "the more liberal provinces that are open to changing Church doctrine on marriage in order to allow same-sex unions include Brazil, Canada, New Zealand, Scotland, South India, South Africa, the US and Wales".
The General Synod of the Anglican Church of Canada in 2004 voted to defer a decision of same-sex blessings until 2007, but also to "Affirm the integrity and sanctity of committed adult same-sex relationships". In 2007, a resolution enabling diocesan bishops to authorize the blessing of same-gender unions narrowly failed, but a statement adopted by General Synod in 2010 "acknowledge[d] diverse pastoral practices as dioceses respond to their own missional contexts,"effectively devolving decisions about blessings to local dioceses.