Humans: a Sexual History and the New Moon Theory
There is an interesting principle in biology, named Haeckel’s Recapitulation Theory: ontogeny recapitulates phylogeny. In simple terms, that means that you can read the whole evolutionary tree leading to a species just by looking at successive development stages of the fetus. We start looking like single-cell individuals, “evolve” into bunches of cells, eventually “turn” into fish, then lizards, then monkeys, etc.
It’s not as simple as that, and the principle/theory has been refuted/rejected. But the idea has wider applications than just in evolutionary biology. In general, I’d say, the notion is that the behavior of the (averaged) individual allows reconstruction of the group’s creation/formation/development.
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