"To my mind at least, same-sex marriage is not so much a radical break with our Protestant American tradition as it is a logical extension of this trajectory and shift that can be found within it. Once you dispense, as most contemporary Christian Americans have, with the two elements that have dominated traditional understandings of marriage throughout history and across the globe, namely, patriarchy (that marriage must include a man and a woman because it is of the nature of men to rule and the nature to women to be ruled), and procreationism (that marriage is essentially about making babies and raising children) then it becomes increasingly hard to exclude two people of the same sex from this institution without special pleading or duplicity."

--Heath Bradley
Why N.T. Wright is Wrong:
Part 1
Part 2

(via AZSpot)