Hugh Nibley
"We're getting into the Mesoamerican, Mayan, and especially Aztec, practice of mass sacrifice of prisoners on a tremendous scale. They did it to the point where it reduced the population so much. There are some very interesting studies made of that recently. At the drop of a hat, prisoners had to be sacrificed. It was not just a sacrifice that was symbolic once in a while; then it became an orgy of blood. That's what they used their sacred towers for after that [development]-sacrifices unto their idol gods. That's what they did." (Teachings From the Book of Mormon, Lecture 105, p. 203)