Robinson Ch 8 Mid Century (19th Century, that is)

This chapter can be divided into East and West and Wester.

The story of the East is told through the story of Henry Whitney Bellows, who was minister in New York and later president of the AUA.  He called for more central power structure - a catholic (small 'c') church - in an effort to evangelize the faith. His call even was not shy about a general creed.  He agitated a lot of people, especially the Transcendentalists, who preferred a more individualistic faith.  He thought Unitarianism was boring and wanted it to be more and saw a unified collective effort to be the best bet. 

He also formed the United States Sanitary Commission to serve as battlefield medical resources for the Northern Army and the first AUA national conference.  He wanted the church to rename itself the Liberal Christian Church of America, but he lost that battle.

The story of the West is told through James Freeman Clark, who was minister in Louisville (which apparently at that point was considered "West" of somewhere.)

Wester is Thomas Starr King, who was in San Francisco, the hub of the Pacific church.  I was interested to learn that he was taught in part by Ballou, but later moved over to Unitarnianism.

The chapter ends with Freeman-Clark's unitarian belief:

1.  The fatherhood of God

2.  The brotherhood of Man

3.  The leadership of Jesus

4.  Salvation by Character

5.  The continuity of human development (aka progress upward and forever)

I think you can see here clearly the great grandfather of our current Principles.