The Meaning of Infancy — Reading Companion

From Automatism to Plasticity

Fiske’s argument hinges on a contrast between two modes of development. In animals with simple, repetitive lives, he writes, “all the nervous connections that need to be made … get made during the foetal period or during the egg period,” so that the creature is born ready to function automatically. Such animals do not learn from individual experience; each generation is nearly identical to the last. Humans, by contrast, face a more varied environment and must perform many actions that are “not performed with the same minuteness and regularity.” Because prenatal life is too short to register all necessary neural connections, the human infant is born with only the capacity to breathe and digest, while higher faculties remain latent. This “plastic period” of infancy, Fiske argues, is the direct result of increased intelligence: natural selection favors intelligence, and intelligence demands a longer, more teachable childhood.

Infancy as the Engine of Progress

Fiske explicitly ties the length of infancy to humanity’s capacity for progress. He states, “if it were not for our period of infancy we should not be progressive.” Without a prolonged developmental window, “one generation would be very much like another.” This is a key structural move in the essay: Fiske shifts from a descriptive evolutionary account to a prescriptive one, suggesting that the very feature that makes humans teachable also makes them capable of cumulative cultural change. The voice here becomes more emphatic, using repetition to drive the point home. He does not merely describe infancy as a biological fact but elevates it to the foundation of human uniqueness. The argument is tightly causal: intelligence leads to longer infancy, which enables learning, which enables progress.

The Family as a Consequence of Helplessness

In the latter part of the excerpt, Fiske turns to social organization. He argues that the helplessness of infants “would prolong the period of maternal affection” and tend to keep mother and child together, eventually drawing the father into stable relationships. This, he claims, is how the family—and later clans—emerged. Fiske is careful to note that “real monogamy … belongs to a comparatively advanced stage,” but the initial bond between mother and infant is the seed. The pace of the prose here quickens: where earlier paragraphs moved stepwise through biological reasoning, this section compresses a vast span of social evolution into a few sentences. The tone remains confident, but the evidence becomes more speculative. Fiske acknowledges that the family has “adumbrations and foreshadowings among the lower animals,” yet insists that in humans it took on a unique form driven by infant dependency.

Readers should note that Fiske’s essay is structured as a single, unfolding argument rather than a series of discrete topics. The transitions between biological, psychological, and social claims are often abrupt, and the evidence for the social consequences is thinner than for the neurological ones. Pay attention to how Fiske uses repetition and contrast—especially the opposition between automatism and plasticity—to build his case. The essay rewards careful reading of its logical scaffolding, even where the conclusions may seem dated.

I keep thinking about how Fiske saw our long helplessness as the very thing that made us gentle and clever. It lingered, that idea, and it drifted into my mind again while reading Evolution and creation — Themes and Context. The way those old arguments still hum softly beneath so much we assume today feels quietly alive, almost like a remembering.