How does Montaigne analyze the ethics of cannibals?

Montaigne analyzes the ethics of cannibals by comparing their ethical system to that of
Europeans. In one of his most telling lines, he argues that "we may then call these people
barbarous, in respect to the rules of reason: but not in respect to ourselves, who in all sorts
of barbarity exceed them." In short, he exercises what we would call today "cultural
relativism" in...