Chapter 1, A Tale of Three Chimps
* The species Homo sapiens (humans) is compared and contrasted to Pan troglodytes (chimpanzees).
* The author rapidly presents several broad areas of research, which suggest that chimps are the closest living relative to humans.
* Recently, molecular data obtained from DNA hybridization suggests that humans, chimpanzees, and gorilla (Gorilla gorilla) are all very closely genetically related.
* The author presents a phylogenetic clade of the hominids which shows chimps, humans, and gorillas breaking off from the remaining higher primates.
* The author then argues that humans and chimps should properly be considered to be two species within a single genus; as Homo precedes Pan in the nomenclature, the author suggests chimps be reclassified as Homo troglodytes and, presumably, Homo paniscus.
* The chapter concludes with an ethical discussion about the implications of classifying chimps as Homo.
Chapter 2, The Great Leap Forward
* Chapter 2 presents a brief overview of...
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