Cannibalism seems to have been forbidden in the Mosaic Law of the Old Testament. I suppose it could be found elsewhere in the Bible. I don't know.
But something about it is repellent to me more than the thought of dying.
I also think perhaps Catholics have an easier time of accepting it, considering their view of the Lord's Supper. I know Shanley, who adapted the film from the book, was raised Catholic.
Sometimes pragmatism isn't always the highest goal.
And I should have added...
"Sometimes pragmatism isn't always the highest goal...as this story on Everest illustrates."
If I'm going to get dietary guidance from Moses, I'm losing shrimp and bacon in the deal. It's one of the real tangible benefits of being a Christian!