Although John Green’s essays tackle a wide range of topics — e.g., Halley’s Comet, the Lascaux cave paintings, Diet Dr Pepper, Piggly Wiggly, the Mountain Goats (the band, not the animal) — the specter of the COVID pandemic looms over all of them. Which is not to say that The Anthropocene Reviewed is gloomy or overwrought. Rather, it feels, in part, like an attempt to impress some order upon a world turned topsy-turvy by shutdowns and uncertainty. Although all of Green’s essays are filled with interesting facts — I learned more about the life and times of Piggly Wiggly founder Clarence Saunders than I previously thought possible — some feel like a bit of a stretch, like an obvious attempt at profundity. But the ones that resonated did so strongly. Sometimes, Green’s just drawing attention to the world’s natural beauty or expressing some antipathy about certain ridiculous facets of modern American life. (The word “hate” doesn’t even begin to describe how I feel about yard work, so naturally, I enjoyed his essay about America’s fascination with Kentucky bluegrass.) And his essays about Academic Decathlon and the QWERTY keyboard resonated because I, too, was a nerd in high school who found expression and a sense of identity via computer keyboards. Throughout the whole of The Anthropocene Reviewed, however, two major themes emerge: (1) humans have had an unmistakable and incalculable effect on the world, for better or worse, and (2) for all of our intelligence and technological advancements, our lives are still very fragile things, especially when faced with a global pandemic.