Thanks for this, Torie. It's very useful.
I would be curious to discover what Pew does with historic peace churches. The Amish, old order Mennonite, Evangelical Mennonite, United Brethren, Church of the Brethren, Quakers and Evangelical Friends Church come to mind.
I suspect they are broken up -- the Evangelical Mennonite and Evangelical Friends with the Evangelicals...and the rest with mainline Protestants?
And Unitarian Universalists? Are they in the "other" category?
They all (except UU) may be in "Other Christian Traditions" (although that may be for the Coptic Church, etc.).