Sex at Dawn

Here we have crystalline expression of the Flintstonizing that can distort the thinking of even the most informed theorists on the origins of human sexual behavior. We’re confident Dr. Fisher will find that what she calls “fundamental differences” in sexual behavior are not differences at all when she looks at the full breadth of information we cover in following chapters. We’ll show that husband/wife marriage and sexual monogamy are far from universal human behaviors, as she and others have argued. Simply because bonobos raise doubts about the naturalness of human long-term pair bonding, Fisher and most other authorities conclude that they cannot serve as models for human evolution. They begin by assuming that long-term sexual monogamy forms the nucleus of the one and only natural, eternal human family structure and reason backwards from there. Yucatan be damned!

I sometimes try to imagine what would have happened if we’d known the bonobo first and chimpanzee only later or not at all. The discussion about human evolution might not revolve as much around violence, warfare, and male dominance, but rather around sexuality, empathy, caring, and cooperation. What a different intellectual landscape we would occupy!

FRANS DE WAAL, Our Inner Ape

The weakness of the “killer ape theory” of human origins becomes clear in light of what’s now known about bonobo behavior. Still, de Waal makes a good case that even without the data that became available in the 1970s, the many flaws in the chimp-fortified Hobbesian view eventually would have emerged. He calls attention to the fact that the theory confuses predation with aggression, assumes that tools originated as weapons, and depicts women as “passive objects of male competition.” He calls for a new scenario that “acknowledges and explains the virtual absence of organized warfare among today’s human foragers, their egalitarian tendencies, and generosity with information and resources across groups.”²⁶

By projecting recent post-agricultural preoccupations with female fidelity into their vision of prehistory, many theorists have Flintstonized their way right into a cul-de-sac. Modern man’s seemingly instinctive impulse to control women’s sexuality is not an intrinsic feature of human nature. It is a response to specific historical socioeconomic conditions—conditions very different from those in which our species evolved. This is key to understanding sexuality in the modern world. De Waal is correct that this hierarchical, aggressive, and territorial behavior is of recent origin for our species. It is, as we’ll see, an adaptation to the social world that arose with agriculture.

From our perspective on the far bank, Helen Fisher, Frans de Waal, and a few others seem to have ventured out onto the bridge that crosses over the rushing stream of unfounded assumptions about human sexuality—but they dare not cross it. Their positions seem, to us, to be compromises that strain against the most parsimonious interpretation of data they know as well as anyone. Confronted with the unignorable fact that human beings sure don’t act like a monogamous species, they make excuses for our “aberrant” (yet perplexingly consistent) behavior. Fisher explains the phenomenon of worldwide marital breakdown by arguing that the pair bond evolved to last only until the infant grows to a child who can keep up with the foraging band without fatherly assistance. For his part, de Waal still argues that the nuclear family is “intrinsically human” and the pair-bond is “the key to the incredible level of cooperation that marks our species.” But

he then suggestively concludes that “our success as a species

is intimately tied to the abandonment of the bonobo lifestyle

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and to a tighter control over sexual expressions.” “Abandonment?” Since it’s impossible to abandon what one never had, de Waal would presumably agree that hominid sexuality was, at some point, profoundly similar to that of the relaxed, promiscuous bonobo—although he never says so explicitly. Nor has he ventured to s₂₈ when or why our ancestors abandoned that way of being.²

Table 2: Comparison of Bonobo, Chimp, and Human

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Socio-sexual Behavior and Infant Development

Human and bonobo females copulate throughout menstrual cycle, as well as during lactation and pregnancy. Female chimps are sexually active only 25-40 percent of

their cycle._

Human and bonobo infants develop much more slowly than chimpanzees, beginning to play with others at about

1.5 years, much later than chimps._