Keywords: Origin of Species illustration cropped.png full version in Charles Darwin's 1859 book On the Origin of Species showing the left part of the diagram as it appears in Daniel Dennett's book Darwin's Dangerous Idea It is found in chapter ten figure 10 9 Bully for Brontosaurus in the section Punctuated Equilibrium A Hopeful Monster Dennett contends that Darwin in fact held the punctuated equilibrium view himself and that it was ironic that the book's single illustration showed steadily sloping ramps On the Origin of Species; scanned from cropped version used in Darwin's Dangerous Idea Charles Darwin Published 1859 PD-old Darwin's Dangerous Idea The Origin of Species 19th-century diagrams Phylogenetic tree of life |