The Invention of Sacrifice: Kellogg Lectures 2016 at Episcopal Divinity School
I have been able to obtain the files and upload them to YouTube for those interested. The first was given, as a working title, "Sacrifice No More: Ideologies of Sacrifice in Modernity."
The second, in which I begin (hesitantly) to provide elements of a revisionist and constructive theology of sacrifice, is "Making Sacrifices to God: Toward a Theology of Gift and Giving."
This link is to the playlist with the two lectures.