Various forms of Protestantism developed from the ferment of the English Civil War onwards. The Quakers (formally, the Religious Society of Friends) were founded by George Fox in the 1640s. Following the Great Ejection of 1662, about a tenth of Church of England ministers gave up their livings, and many of them contributed to various forms of Rational Dissent which evolved via English Presbyterianism into, among others, Unitarianism, which still has more than 100 congregations in the 21st century. Methodism developed from the 18th century onwards. The Methodist revival was started in England by a group of men including John Wesley and his younger brother Charles as a movement within the Church of England, but developed as a separate denomination after John Wesley's death. The primary church in England is the Methodist Church of Great Britain. The Salvation Army dates back to 1865, when it was founded in East London by William and Catherine Booth. Its international headquarters are still in London, near St Paul's Cathedral. There is one Mennonite congregation in England, the Wood Green Mennonite Church in London.