Cambrian

The Cambrian enters the novel as an evolutionary time marker in Crowe’s argument against human exceptionalism. She uses the immense span of life’s history to suggest that humanity is one contingent outcome among many possible paths, not the destined endpoint of a progressive process.

The Cambrian in Crowe’s Argument

Crowe locates the beginning of her thought experiment in the Cambrian, referring to the possible turns multicellular life could have taken since its origins. The period is not presented through a separate scene or historical account; it supplies the deep-time horizon for her reasoning about what might have evolved instead of humans.

Contingency Rather Than Progress

Crowe’s point is that the path leading to humanity depended on conditions and chance, rather than on a logic directing life toward greater complexity or human rule. From the Cambrian onward, she says, evolution could have taken millions of possible turns. The reference therefore unsettles the assumption that humanity represents the culmination of natural history: the Cambrian marks the beginning of a branching possibility, not a guaranteed ascent toward human dominance.