Founded in 1833 by John Thomas (b. 12 April 1805, d. 1871) in the USA, although it wasn't offically called Christadelphians until 1865, a name chosen by John Thomas which had been used by some branches before then. They're big on end-times prophecies and doom-and-gloom stuff, although in New Zealand are nowhere near as high-profile as the
Seventh-Day Adventists on that topic. Each Christadelphian branch is operated independently and is called an "ecclesia" - from the Greek word meaning church. Unlike other cults of Christianity such as
JWs and
Mormons, Christadelphians have no formal hierarchy, and instead get things done by committee, with Christadelphian members being voted onto the committees on a yearly basis. On the theological side of things the Christadelphians think that Jesus is a created being and that he was born with a sinful nature* (and yet never actually sinned), the Holy Spirit is just the "power" of God, there is no personal devil (they believe the devil is just the impulse to do evil), no Hell, etc - all of which contradicts Christian teaching. On the practical side, Christadelphians believe people are saved by works, which means they have to do stuff (like the
Jehovah's Witnesses' belief that JWs
have to go door knocking to be saved). To be saved (or become Christadelphian members) Christadelphians have to be baptised, which involves an interview (described by some as a "lengthy interrogation") by other Christadelphians to see if they have an intellectual understanding in accordance with John Thomas' teachings. Some ecclesia are thought to have at times discouraged membership of groups outside of the Christadelphians (eg, women's social club, after-school sports, etc), perhaps for being too worldly, but for many New Zealand branches this has apparently not been an issue. Women are supposed to keep silent in church but are allowed to teach children. The
1996 NZ Census showed a little over 1700 members in New Zealand.