this class of the lowly is the source from which the master class draws its livelihood and leisure. thraldom [slavery] is a degree of cannibalism. it is a system of man feeding upon man.—carl o. willion

 complete quote: 

this class of the lowly is the source from which the master class draws its livelihood and leisure. thraldom [slavery] is a degree of cannibalism. it is a system of man feeding upon man. the master is a human parasite, who, by the right of might, has secured his fellow-men in the bonds of thraldom in order to feed upon them and to use them for the satisfaction of his appetites.

—carl o. williams, thraldom [slavery] in ancient iceland, 1937