An unsettling email, from an environmentalist friend, arrives on Robert Donato's computer during the Covid-19 pandemic. Its receipt and Donato's reply set off a discussion chain that shockingly reveals how and why the Earth itself is in danger of going bankrupt. As the picture unfolds, it's clear that there are tough environmental and socioeconomic choices ahead for civilization as we know it. "Rarely has so much wisdom been packed into so few pages...