Two Unitarian Universalist Association Commission on Appraisal reports address issues raised in this workshop:

Belonging: The Meaning of Membership (Boston: UUA, 2001)

Engaging Our Theological Diversity (Boston, UUA, 2005)

Here are resources for exploring orthodoxy and heresy in Christian history:

Irvin, Dale T. and Scott W. Sunquist. History of the World Christian Movement, Vol. I: Earliest Christianity to 1453 (Maryknoll, NY: Orbis Books, 2001)

Levy, Leonard Williams, Blasphemy (University of North Carolina Press, 1995)