Thought in a Hostile World
Source: https://www.wiley.com/en-us/Thought+in+a+Hostile+World-p-9780631188872 ↗
How did the mind evolve under real adaptive pressure — in a world of predators, parasites, deception, and environmental unpredictability — rather than in the sanitised environment many cognitive models assume? Sterelny argues that the standard evolutionary psychology approach (fixed modules for a fixed ancestral environment) badly underestimates the flexibility and ecological sensitivity of human cognition.
He proposes instead that minds evolved as tracking devices for a world that is actively hostile to accurate representation.
The book bridges philosophy of biology and philosophy of mind in a way that neither discipline manages alone.
Dense but rewarding, it provides the theoretical underpinning for the more accessible argument Sterelny develops later in The Evolved Apprentice.
Central argument
Sterelny argues that human cognition evolved not as a set of fixed, domain-specific modules adapted to a stable ancestral environment — the standard evolutionary psychology picture — but as a flexible tracking system shaped by persistent hostility: predators, parasites, social deception, and environmental unpredictability. The mind, on his account, is a device for maintaining accurate representation under adversarial conditions, which requires plasticity and ecological sensitivity rather than hardwired heuristics. This reframing shifts the explanatory burden from 'what problems were reliably present in the EEA?' to 'what cognitive architecture survives when the world actively resists accurate perception?'
Critique
Sterelny's framework gains its power partly by positioning the hostile-world thesis against a somewhat simplified version of evolutionary psychology — one that practitioners in that field would recognise as a caricature of Tooby and Cosmides' actual position on modularity. More substantively, the emphasis on tracking and representation leaves underspecified the mechanisms by which ecological pressure actually produces flexible cognition rather than more robust fixed modules; the argument is philosophically compelling but light on the genetic and developmental machinery that would make it empirically tractable. Readers wanting a tight link between the theoretical claims and specific cognitive phenomena may find the book more programmatic than conclusive.
Why it matters for product
The hostile-world framing is a direct corrective to product discovery processes that model users as operating in stable, benign information environments — optimising toward a fixed set of needs with reliable attention and accurate self-knowledge. If cognition is fundamentally a tracking system adapted to deception and noise, then your research methods need to account for the fact that users are not reporting preferences so much as navigating competing signals, which changes how you weight stated needs against observed behaviour. For team design, Sterelny's argument also challenges the modular organisation logic — splitting product, design, and engineering into fixed domain teams mirrors the very cognitive architecture he argues is too brittle for a world that keeps changing the rules.