Ernst Haeckel’s Anthropogenie oder Entwickelungsgeschichte des Menschen (1891) stands as one of the seminal works in 19th-century evolutionary biology, presenting Haeckel’s influential study of human development and evolution. In this landmark volume, Haeckel explores the parallels between embryological growth and the evolutionary history of mankind, a theory encapsulated in his famous phrase “ontogeny recapitulates phylogeny.” Richly illustrated with striking plates and diagrams, the work visually captures the scientific and philosophical depth of Haeckel’s arguments, reflecting his unique ability to merge art and science. This 1891 edition shows wear and rubbing to the cover, with the first three leaves detached. The hinges remain sound, and the illustrations are particularly vivid and well-preserved, offering a compelling glimpse into one of the most visually and intellectually ambitious scientific works of its era.