Before they vanish. Saving nature's populations—and ourselves. Ehrlich, P. R., Ceballos, G., and R. Dirzo. 2024. Johns Hopkins University Press, Baltimore, MD. xxiv+348 pp. US$29.95 (hardcover). ISBN 978-1-4214 4969-2. The 3 authors of this book are known for their forceful presentation of the biodiversity crisis, which have been summarized in influential books and articles (e.g., Dirzo et al., 2014; Ehrlich, 1968), and for the terms they have coined, such as biological annihilation and defaunation.