A number of our current leaders could do with listening to some Aztec advice for handling pandemics: Turns out the Aztec empire that occupied present-day Mexico throughout much of the second millennium had a handbook for responding to plagues and epidemics, says Zocalo Public Square. The Aztecs ended up succumbing to smallpox — brought to the continent by the Spanish invaders — but within our record of the empire’s moral philosophy, we find extensive warnings to new rulers facing rampant diseases, emphasizing grace and wisdom. The number one Aztec rule: “Do not be a fool.”