There are some interesting differences between Evangelicals in the US and UK. It’s not that there aren’t also similarities (especially more recently), but US fundies always seemed way more right wing than the ones I knew closer to home. UK Evangelicals and other nonconformists (including Quakers and Unitarians) have historically had quite a large presence in the left wing. In the 19th century they were often members of the Liberal Party and were instrumental in the early Labour Party (apparently it adopted more of the nonconformist spirit than its policies, but the contribution was still significant). The first editor of the New Statesman was the son of a Congregational minister (later Unitarian) and claims to have learned a lot about passive resistance from nonconformists. Prison reform was pioneered by people like John Howard (a Calvinist) and Elizabeth Fry (a Quaker). This is an account of my g. g. g. grandparents, once removed (Mr. and Mrs. W. S. Aldis):
Apparently there was a later petition, but by all accounts they were the first to petition for a change. W. S. Aldis won the Tripos (mathematics test) in his year, and was one of two Baptists and a Jew (who was a close friend of the family) whose success led to the abolishing of the religious tests in Cambridge and Oxford. They were both the children of Baptist ministers, and his mother was described as highly intellectual. They combined surnames when they got married, and he supported her scientific study (astronomy). When I was told about my roots as a Baptist by my parents, the implication was that good Christians were also active SJWs (albeit within a particular religious framework).
Obviously along with this there were a lot of less progressive or overly moralistic elements (W. S. Aldis ended up being dismissed from an academic post because of his outspoken and uncompromising social and moral positions, particularly on drinking), but I would say that this legacy has coloured the more historically-minded UK Evangelicals. I got the impression that while many didn’t approve of the more liberal theology, Unitarians and Quakers were seen more as ideological cousins, particularly from a social perspective. I’m not sure whether that translated into a lasting relationship though; I suspect not. It’s interesting to see how particular sects interact with their world, especially when they are in the position of an underprivileged minority in a country compared to a large and politically powerful group in a country that adopted key nonconformist positions like separation of church and state. I suppose in America, Evangelicals had no nonconformist connection with other minority religious groups like Unitarians and Quakers, since there’s no established church.