 Haeckel saw ontogeny as the brief and rapid recapitulation of phylogeny and saw each individual’s development as following the sequence of, and indeed caused by, the evolutionary history of that individual organism’s species. In his highly popular books, widely translated and widely read, Haeckel offered pictures of comparative embryology. See, he seemed to suggest, the human form emerges following the evolutionary development and adaptations of its ancestors. Form comes from form of the ancestors, and it unfolds following pre-scripted stages (Haeckel 1866).