Chapter 14 Opener Although the behavior of the young African men in the Gerewol ceremony probably would seem very strange to most readers of this textbook, evolutionary analyses might persuade you that the cultural differences between us and them conceal some very important ultimate similarities

Figure 14.1 Chimpanzee trained to use “language”

Figure 14.2 Does heredity play a role in the development of verbal and spatial intelligence?

Figure 14.2 Does heredity play a role in the development of verbal and spatial intelligence? (Part 1)

Figure 14.2 Does heredity play a role in the development of verbal and spatial intelligence? (Part 2)

Figure 14.3 Regions of the brain implicated in language abilities

Figure 14.4 The function of the superior temporal sulcus of the brain

Figure 14.5 This cartoon captures the sexual selectionist interpretation of language use by men

Figure 14.6 Mate choice based on facial appearance

Figure 14.7 Age and the market value of men

Figure 14.8 Women who think they are highly attractive prefer more attractive men

Figure 14.8 Women who think they are highly attractive prefer more attractive men (Part 1)

Figure 14.8 Women who think they are highly attractive prefer more attractive men (Part 2)

Figure 14.9 Self-perception of attractiveness affects mate preferences

Figure 14.10 Higher income increases male copulatory success

Figure 14.11 Fertility declines as family income increases

Figure 14.12 Body shape is correlated with fertility in women

Figure 14.13 Facial appearance provides a cue of circulating estrogen levels

Figure 14.14 Mating preferences of dominant chimpanzee males

Figure 14.14 Mating preferences of dominant chimpanzee males (Part 1)

Figure 14.14 Mating preferences of dominant chimpanzee males (Part 2)

Figure 14.15 Preferred dating partners by age for male teenagers

Figure 14.16 The menstrual cycle affects female mate choice

Figure 14.17 Females differ with respect to facial features they associate with dominant men versus attractive men

Figure 14.17 Females differ with respect to facial features they associate with dominant men versus attractive men (Part 1)

Figure 14.17 Females differ with respect to facial features they associate with dominant men versus attractive men (Part 2)

Figure 14.18 Adaptive regulation of extra-pair affairs

Figure 14.19 Sex differences in the desire for sexual variety

Figure 14.19 Sex differences in the desire for sexual variety (Part 1)

Figure 14.19 Sex differences in the desire for sexual variety (Part 2)

Figure 14.20 A male bias toward sexual overperception

Figure 14.21 Sex differences in mate selectivity

Figure 14.22 Rape occurs in animals other than humans

Figure 14.23 Testing alternative hypotheses for sexual assault

Figure 14.24 The author with his two grandchildren, Abby and Jake Alcock, both much admired additions to an already overcrowded world

Figure 14.25 Unsustainable exploitation of the Earth’s resources

Figure 14.26 Homicide rates are highly correlated with male life expectancy