This chapter speculates on origins and character of use of symbolism. It points out that reproduction strategies make heavy use of information. Thesis is advanced that change in required strategy force shift in communicative strategy. Extended discussion of why human reproductive strategies are unstable and unworkable without symbolic communication. Hominids were not polygonous - mild dimorphism establishes that.
Teeth suggest principal diet of tubers.
Early hominids shifted to regular inclusion of meat in diet. Extended discussion of parenting strategies among different species. Arguments for symbolic communication needed for reciprocal altruism - again dubious. Extended discussion of probable early symbolic communication. Not language as we know it.