Fig wasps

Fig wasps are the indispensable pollinators in the book’s account of the fig–fig wasp relationship, a partnership whose apparent cooperation is maintained by reciprocal reproductive benefits and a form of retaliation against cheating. The example shows how behavioral strategies can serve gene propagation without conscious calculation, and how the interests of partners can coincide without being identical.

The fig as pollination chamber

A fig is not, in this account, a conventional fruit. A tiny opening leads into an enclosed space lined with hundreds of small flowers. The fig wasp is small enough to enter, and it is the only pollinating agent described for these flowers. The tree benefits when the wasp carries out pollination inside this chamber; the wasp, in turn, uses some of the flowers to lay eggs, whose larvae feed on them.

The wasp’s activity therefore combines two distinct effects within the same fig. It pollinates some flowers, supporting the tree’s reproduction, while placing eggs in others, providing food for its offspring. Neither partner’s benefit makes the arrangement selfless: each depends on the other’s activity, but their reproductive interests do not perfectly overlap.

Defection and retaliation

The book frames a wasp’s potential defection as laying eggs in too many flowers while pollinating too few. The tree’s response supplies the sharp consequence: in many cases, if a wasp entering a young fig fails to pollinate enough flowers and lays eggs in almost all of them, the tree cuts off the developing fig early. All the wasp’s progeny then perish. The developing fig thus becomes the point at which a partner’s failure can be answered at the cost of the wasp’s entire brood.

This example is presented as a natural arrangement resembling a reciprocal strategy: cooperation can continue because excessive exploitation may be met with a response that makes defection costly. The account does not attribute conscious bargaining to either organism. The strategy language describes outcomes shaped by natural selection, not plans worked out by a tree or wasp.

Shared interests and evolutionary significance

The fig and the wasp have a real common interest: the tree benefits from the wasp’s pollination, while the wasp uses the flowers to reproduce. That mutual benefit does not erase the conflict over how many flowers are pollinated and how many receive eggs. The threat of fig abortion illustrates how a relationship can combine cooperation with a constraint on exploitation.

More broadly, the example supports the book’s account of genes as having effects beyond the bodies that contain them. Its discussion uses the fig–wasp partnership to show how selection can favor behavior that affects another organism, while emphasizing that the apparent purposefulness of such behavior is metaphorical. Fig wasps therefore serve not merely as pollinators in an unusual flower chamber, but as one side of a concrete demonstration that cooperation and conflict can arise together from the reproductive consequences of interaction.