Harsh childhood environments shape future reproduction, but not always as evolutionary theory predicts
Evolutionary Psychology
A massive Canadian census study puts psychosocial acceleration theory to the test — and finds that harsh environments don't always trigger early reproduction the way evolution predicts.
Life History TheoryPsychosocial Acceleration TheoryEvolutionary PsychologyEcological Systems Theory
Theory Briefing
- Analyzing millions of Canadian census data points, researchers found 2006 neighborhood conditions predicted 81% of variance in reproduction rates 15 years later.
- Higher child poverty rates predicted more single-parent households, supporting the theory — but high unemployment and rental costs predicted fewer large families, contradicting it.
- Because the reversed model (using 2021 data to predict 2006 outcomes) failed, the findings suggest a real developmental timeline, not just a statistical coincidence.