For thousands of years, there was only one kind of milk, what Americans would call "whole milk." But to our ancestors, this was just "milk." In 1985, governments recommended fat-free (skim) milk over (whole) milk. For Nietzshe, skim milk was really "slave milk." What milk should we drink? Don't ask your government; ask the ancients. The story of Yael and Sisera demonstrates the superiority of full-fat milk.